The Experts below are selected from a list of 183 Experts worldwide ranked by ideXlab platform
Qian Liu - One of the best experts on this subject based on the ideXlab platform.
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Preparation and Thermal Conductivity of Spark Plasma Sintered Aluminum Matrix Composites Reinforced with Titanium‐Coated Graphite Fibers
Advanced Engineering Materials, 2014Co-Authors: Tingting Liu, Qian Liu, Shubin Ren, Zhang LinAbstract:Short Graphite Fiber/Al composites are fabricated by spark plasma sintering technique. A titanium coating synthesized on the Graphite Fiber surface through vacuum microdeposition is proposed to improve the interfacial bonding between Graphite Fibers and aluminum matrix. The influences of surface modification, sintering temperature, and Graphite Fiber volume fraction on relative density and thermal conductivity (TC) of the composites are systematically investigated. The results indicate that compared to uncoated Graphite Fiber/Al composites, the densification, interfacial bonding, and TC of titanium-coated composites are greatly enhanced. The in-plane TC of 50 vol% titanium-coated Graphite Fiber/Al composites sintered at 610 °C is 238 W m−1 K−1, nearly twice as high as that of uncoated composites. From the calculation based on the experimental TC by Maxwell–Garnett effective medium approach, the interfacial thermal resistance is evidently decreased by above 1 order of magnitude with the introduction of titanium nanolayer.
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fabrication and thermal conductivity of short Graphite Fiber al composites by vacuum pressure infiltration
Journal of Composite Materials, 2014Co-Authors: Tingting Liu, Lin Zhang, Qian LiuAbstract:Short Graphite Fiber/Al composites were fabricated by a modified two-step vacuum pressure infiltration technique. Copper-coated Graphite Fibers preform was infiltrated with liquid aluminum at 800℃ under infiltration pressure of 1 MPa and solidification pressure of 30 MPa for 30 min. The effects of surface modification and the processing parameters of vacuum pressure infiltration on relative density and thermal conductivity of the composites were systematically studied. The results show that short Graphite Fiber/Al composite with relatively high density of 99.1% and thermal conductivity of 208 W·m−1·K−1 was successfully fabricated. Through the application of copper coating onto the Graphite Fibers, the in-plane thermal conductivity of the composite was effectively enhanced from 117 W·m−1·K−1 to 208 W·m−1·K−1 as a result of improved interfacial bonding. The obtained short Graphite Fiber/Al composites are promising materials for electronic packing applications.
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effect of chromium carbide coating on thermal properties of short Graphite Fiber al composites
Journal of Materials Science, 2014Co-Authors: Tingting Liu, Qian Liu, Shubin Ren, Qiping Kang, Lin ZhangAbstract:A chromium carbide coating was synthesized onto Graphite Fibers by molten salts method to improve the interfacial bonding and thermal properties of short Graphite Fiber/Al composites which were fabricated by vacuum pressure infiltration technique. The Graphite Fiber/Al composites with different thicknesses of chromium carbide coatings were prepared through varying plating times to investigate the influence of chromium carbide layer on the microstructures and thermal properties of the composites. The combined Maxwell–Garnett effective medium approach and acoustic mismatch model schemes were used to theoretically predict thermal conductivities of the composites. The results indicated that the chromium carbide coating formed on Graphite Fiber surface in molten salts consists mainly of the Cr7C3 phase. The Cr7C3-coating layer with plating time of 60 min and thickness of 0.5 μm was found to be most effective in improving the interfacial bonding and decreasing the interfacial thermal resistance between Graphite Fiber and aluminum matrix. The 40 vol% Cr7C3-coated Graphite Fiber/Al composite with Cr7C3 thickness of 0.5 μm exhibited 45.4 % enhancement in in-plane thermal conductivity of 221 W m−1 K−1 compared to that of uncoated composite, as well as the coefficient of thermal expansion of 9.4 × 10−6 K−1, which made it as very interesting material for thermal management applications.
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Fabrication and thermal conductivity of short Graphite Fiber/Al composites by vacuum pressure infiltration
Journal of Composite Materials, 2013Co-Authors: Tingting Liu, Lin Zhang, Qian LiuAbstract:Short Graphite Fiber/Al composites were fabricated by a modified two-step vacuum pressure infiltration technique. Copper-coated Graphite Fibers preform was infiltrated with liquid aluminum at 800℃ under infiltration pressure of 1 MPa and solidification pressure of 30 MPa for 30 min. The effects of surface modification and the processing parameters of vacuum pressure infiltration on relative density and thermal conductivity of the composites were systematically studied. The results show that short Graphite Fiber/Al composite with relatively high density of 99.1% and thermal conductivity of 208 W·m−1·K−1 was successfully fabricated. Through the application of copper coating onto the Graphite Fibers, the in-plane thermal conductivity of the composite was effectively enhanced from 117 W·m−1·K−1 to 208 W·m−1·K−1 as a result of improved interfacial bonding. The obtained short Graphite Fiber/Al composites are promising materials for electronic packing applications.
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effect of titanium carbide coating on the microstructure and thermal conductivity of short Graphite Fiber copper composites
Journal of Materials Science, 2013Co-Authors: Qian Liu, Tingting Liu, Shubin Ren, Qiping KangAbstract:Graphite Fiber–Cu composites have drawn much attention in electronic packaging due to its excellent machinability and thermal properties. However, the weak interface bonding between Graphite Fiber and copper resulted in low thermo-mechanical properties of composites. In this work, a titanium carbide coating with thickness of 0.1 μm or 1 μm was synthesized on the surface of Graphite Fiber through molten salts method to strengthen interfacial bonding. The enhanced composites present 24–43 % increase in thermal conductivity and achieve the thermal conductivity of 330–365 W m−1 K−1 as well as the coefficient of thermal expansion of 6.5 × 10−6–14 × 10−6 K−1. A Maxwell–Garnett effective medium approach on the anisotropic short Fiber reinforcement with interfacial thermal resistance was established. The obtained enhancement was in good agreement with the estimates. The results suggest that the major factor that influences the thermal conductivities is not the interfacial thermal resistance but the low thermal conductivity of Fiber in transversal direction when a well interfacial bonding is obtained.
Tingting Liu - One of the best experts on this subject based on the ideXlab platform.
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Preparation and Thermal Conductivity of Spark Plasma Sintered Aluminum Matrix Composites Reinforced with Titanium‐Coated Graphite Fibers
Advanced Engineering Materials, 2014Co-Authors: Tingting Liu, Qian Liu, Shubin Ren, Zhang LinAbstract:Short Graphite Fiber/Al composites are fabricated by spark plasma sintering technique. A titanium coating synthesized on the Graphite Fiber surface through vacuum microdeposition is proposed to improve the interfacial bonding between Graphite Fibers and aluminum matrix. The influences of surface modification, sintering temperature, and Graphite Fiber volume fraction on relative density and thermal conductivity (TC) of the composites are systematically investigated. The results indicate that compared to uncoated Graphite Fiber/Al composites, the densification, interfacial bonding, and TC of titanium-coated composites are greatly enhanced. The in-plane TC of 50 vol% titanium-coated Graphite Fiber/Al composites sintered at 610 °C is 238 W m−1 K−1, nearly twice as high as that of uncoated composites. From the calculation based on the experimental TC by Maxwell–Garnett effective medium approach, the interfacial thermal resistance is evidently decreased by above 1 order of magnitude with the introduction of titanium nanolayer.
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fabrication and thermal conductivity of short Graphite Fiber al composites by vacuum pressure infiltration
Journal of Composite Materials, 2014Co-Authors: Tingting Liu, Lin Zhang, Qian LiuAbstract:Short Graphite Fiber/Al composites were fabricated by a modified two-step vacuum pressure infiltration technique. Copper-coated Graphite Fibers preform was infiltrated with liquid aluminum at 800℃ under infiltration pressure of 1 MPa and solidification pressure of 30 MPa for 30 min. The effects of surface modification and the processing parameters of vacuum pressure infiltration on relative density and thermal conductivity of the composites were systematically studied. The results show that short Graphite Fiber/Al composite with relatively high density of 99.1% and thermal conductivity of 208 W·m−1·K−1 was successfully fabricated. Through the application of copper coating onto the Graphite Fibers, the in-plane thermal conductivity of the composite was effectively enhanced from 117 W·m−1·K−1 to 208 W·m−1·K−1 as a result of improved interfacial bonding. The obtained short Graphite Fiber/Al composites are promising materials for electronic packing applications.
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effect of chromium carbide coating on thermal properties of short Graphite Fiber al composites
Journal of Materials Science, 2014Co-Authors: Tingting Liu, Qian Liu, Shubin Ren, Qiping Kang, Lin ZhangAbstract:A chromium carbide coating was synthesized onto Graphite Fibers by molten salts method to improve the interfacial bonding and thermal properties of short Graphite Fiber/Al composites which were fabricated by vacuum pressure infiltration technique. The Graphite Fiber/Al composites with different thicknesses of chromium carbide coatings were prepared through varying plating times to investigate the influence of chromium carbide layer on the microstructures and thermal properties of the composites. The combined Maxwell–Garnett effective medium approach and acoustic mismatch model schemes were used to theoretically predict thermal conductivities of the composites. The results indicated that the chromium carbide coating formed on Graphite Fiber surface in molten salts consists mainly of the Cr7C3 phase. The Cr7C3-coating layer with plating time of 60 min and thickness of 0.5 μm was found to be most effective in improving the interfacial bonding and decreasing the interfacial thermal resistance between Graphite Fiber and aluminum matrix. The 40 vol% Cr7C3-coated Graphite Fiber/Al composite with Cr7C3 thickness of 0.5 μm exhibited 45.4 % enhancement in in-plane thermal conductivity of 221 W m−1 K−1 compared to that of uncoated composite, as well as the coefficient of thermal expansion of 9.4 × 10−6 K−1, which made it as very interesting material for thermal management applications.
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Fabrication and thermal conductivity of short Graphite Fiber/Al composites by vacuum pressure infiltration
Journal of Composite Materials, 2013Co-Authors: Tingting Liu, Lin Zhang, Qian LiuAbstract:Short Graphite Fiber/Al composites were fabricated by a modified two-step vacuum pressure infiltration technique. Copper-coated Graphite Fibers preform was infiltrated with liquid aluminum at 800℃ under infiltration pressure of 1 MPa and solidification pressure of 30 MPa for 30 min. The effects of surface modification and the processing parameters of vacuum pressure infiltration on relative density and thermal conductivity of the composites were systematically studied. The results show that short Graphite Fiber/Al composite with relatively high density of 99.1% and thermal conductivity of 208 W·m−1·K−1 was successfully fabricated. Through the application of copper coating onto the Graphite Fibers, the in-plane thermal conductivity of the composite was effectively enhanced from 117 W·m−1·K−1 to 208 W·m−1·K−1 as a result of improved interfacial bonding. The obtained short Graphite Fiber/Al composites are promising materials for electronic packing applications.
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effect of titanium carbide coating on the microstructure and thermal conductivity of short Graphite Fiber copper composites
Journal of Materials Science, 2013Co-Authors: Qian Liu, Tingting Liu, Shubin Ren, Qiping KangAbstract:Graphite Fiber–Cu composites have drawn much attention in electronic packaging due to its excellent machinability and thermal properties. However, the weak interface bonding between Graphite Fiber and copper resulted in low thermo-mechanical properties of composites. In this work, a titanium carbide coating with thickness of 0.1 μm or 1 μm was synthesized on the surface of Graphite Fiber through molten salts method to strengthen interfacial bonding. The enhanced composites present 24–43 % increase in thermal conductivity and achieve the thermal conductivity of 330–365 W m−1 K−1 as well as the coefficient of thermal expansion of 6.5 × 10−6–14 × 10−6 K−1. A Maxwell–Garnett effective medium approach on the anisotropic short Fiber reinforcement with interfacial thermal resistance was established. The obtained enhancement was in good agreement with the estimates. The results suggest that the major factor that influences the thermal conductivities is not the interfacial thermal resistance but the low thermal conductivity of Fiber in transversal direction when a well interfacial bonding is obtained.
Lin Zhang - One of the best experts on this subject based on the ideXlab platform.
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fabrication and thermal conductivity of short Graphite Fiber al composites by vacuum pressure infiltration
Journal of Composite Materials, 2014Co-Authors: Tingting Liu, Lin Zhang, Qian LiuAbstract:Short Graphite Fiber/Al composites were fabricated by a modified two-step vacuum pressure infiltration technique. Copper-coated Graphite Fibers preform was infiltrated with liquid aluminum at 800℃ under infiltration pressure of 1 MPa and solidification pressure of 30 MPa for 30 min. The effects of surface modification and the processing parameters of vacuum pressure infiltration on relative density and thermal conductivity of the composites were systematically studied. The results show that short Graphite Fiber/Al composite with relatively high density of 99.1% and thermal conductivity of 208 W·m−1·K−1 was successfully fabricated. Through the application of copper coating onto the Graphite Fibers, the in-plane thermal conductivity of the composite was effectively enhanced from 117 W·m−1·K−1 to 208 W·m−1·K−1 as a result of improved interfacial bonding. The obtained short Graphite Fiber/Al composites are promising materials for electronic packing applications.
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effect of chromium carbide coating on thermal properties of short Graphite Fiber al composites
Journal of Materials Science, 2014Co-Authors: Tingting Liu, Qian Liu, Shubin Ren, Qiping Kang, Lin ZhangAbstract:A chromium carbide coating was synthesized onto Graphite Fibers by molten salts method to improve the interfacial bonding and thermal properties of short Graphite Fiber/Al composites which were fabricated by vacuum pressure infiltration technique. The Graphite Fiber/Al composites with different thicknesses of chromium carbide coatings were prepared through varying plating times to investigate the influence of chromium carbide layer on the microstructures and thermal properties of the composites. The combined Maxwell–Garnett effective medium approach and acoustic mismatch model schemes were used to theoretically predict thermal conductivities of the composites. The results indicated that the chromium carbide coating formed on Graphite Fiber surface in molten salts consists mainly of the Cr7C3 phase. The Cr7C3-coating layer with plating time of 60 min and thickness of 0.5 μm was found to be most effective in improving the interfacial bonding and decreasing the interfacial thermal resistance between Graphite Fiber and aluminum matrix. The 40 vol% Cr7C3-coated Graphite Fiber/Al composite with Cr7C3 thickness of 0.5 μm exhibited 45.4 % enhancement in in-plane thermal conductivity of 221 W m−1 K−1 compared to that of uncoated composite, as well as the coefficient of thermal expansion of 9.4 × 10−6 K−1, which made it as very interesting material for thermal management applications.
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Fabrication and thermal conductivity of short Graphite Fiber/Al composites by vacuum pressure infiltration
Journal of Composite Materials, 2013Co-Authors: Tingting Liu, Lin Zhang, Qian LiuAbstract:Short Graphite Fiber/Al composites were fabricated by a modified two-step vacuum pressure infiltration technique. Copper-coated Graphite Fibers preform was infiltrated with liquid aluminum at 800℃ under infiltration pressure of 1 MPa and solidification pressure of 30 MPa for 30 min. The effects of surface modification and the processing parameters of vacuum pressure infiltration on relative density and thermal conductivity of the composites were systematically studied. The results show that short Graphite Fiber/Al composite with relatively high density of 99.1% and thermal conductivity of 208 W·m−1·K−1 was successfully fabricated. Through the application of copper coating onto the Graphite Fibers, the in-plane thermal conductivity of the composite was effectively enhanced from 117 W·m−1·K−1 to 208 W·m−1·K−1 as a result of improved interfacial bonding. The obtained short Graphite Fiber/Al composites are promising materials for electronic packing applications.
Shubin Ren - One of the best experts on this subject based on the ideXlab platform.
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Preparation and Thermal Conductivity of Spark Plasma Sintered Aluminum Matrix Composites Reinforced with Titanium‐Coated Graphite Fibers
Advanced Engineering Materials, 2014Co-Authors: Tingting Liu, Qian Liu, Shubin Ren, Zhang LinAbstract:Short Graphite Fiber/Al composites are fabricated by spark plasma sintering technique. A titanium coating synthesized on the Graphite Fiber surface through vacuum microdeposition is proposed to improve the interfacial bonding between Graphite Fibers and aluminum matrix. The influences of surface modification, sintering temperature, and Graphite Fiber volume fraction on relative density and thermal conductivity (TC) of the composites are systematically investigated. The results indicate that compared to uncoated Graphite Fiber/Al composites, the densification, interfacial bonding, and TC of titanium-coated composites are greatly enhanced. The in-plane TC of 50 vol% titanium-coated Graphite Fiber/Al composites sintered at 610 °C is 238 W m−1 K−1, nearly twice as high as that of uncoated composites. From the calculation based on the experimental TC by Maxwell–Garnett effective medium approach, the interfacial thermal resistance is evidently decreased by above 1 order of magnitude with the introduction of titanium nanolayer.
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effect of chromium carbide coating on thermal properties of short Graphite Fiber al composites
Journal of Materials Science, 2014Co-Authors: Tingting Liu, Qian Liu, Shubin Ren, Qiping Kang, Lin ZhangAbstract:A chromium carbide coating was synthesized onto Graphite Fibers by molten salts method to improve the interfacial bonding and thermal properties of short Graphite Fiber/Al composites which were fabricated by vacuum pressure infiltration technique. The Graphite Fiber/Al composites with different thicknesses of chromium carbide coatings were prepared through varying plating times to investigate the influence of chromium carbide layer on the microstructures and thermal properties of the composites. The combined Maxwell–Garnett effective medium approach and acoustic mismatch model schemes were used to theoretically predict thermal conductivities of the composites. The results indicated that the chromium carbide coating formed on Graphite Fiber surface in molten salts consists mainly of the Cr7C3 phase. The Cr7C3-coating layer with plating time of 60 min and thickness of 0.5 μm was found to be most effective in improving the interfacial bonding and decreasing the interfacial thermal resistance between Graphite Fiber and aluminum matrix. The 40 vol% Cr7C3-coated Graphite Fiber/Al composite with Cr7C3 thickness of 0.5 μm exhibited 45.4 % enhancement in in-plane thermal conductivity of 221 W m−1 K−1 compared to that of uncoated composite, as well as the coefficient of thermal expansion of 9.4 × 10−6 K−1, which made it as very interesting material for thermal management applications.
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effect of titanium carbide coating on the microstructure and thermal conductivity of short Graphite Fiber copper composites
Journal of Materials Science, 2013Co-Authors: Qian Liu, Tingting Liu, Shubin Ren, Qiping KangAbstract:Graphite Fiber–Cu composites have drawn much attention in electronic packaging due to its excellent machinability and thermal properties. However, the weak interface bonding between Graphite Fiber and copper resulted in low thermo-mechanical properties of composites. In this work, a titanium carbide coating with thickness of 0.1 μm or 1 μm was synthesized on the surface of Graphite Fiber through molten salts method to strengthen interfacial bonding. The enhanced composites present 24–43 % increase in thermal conductivity and achieve the thermal conductivity of 330–365 W m−1 K−1 as well as the coefficient of thermal expansion of 6.5 × 10−6–14 × 10−6 K−1. A Maxwell–Garnett effective medium approach on the anisotropic short Fiber reinforcement with interfacial thermal resistance was established. The obtained enhancement was in good agreement with the estimates. The results suggest that the major factor that influences the thermal conductivities is not the interfacial thermal resistance but the low thermal conductivity of Fiber in transversal direction when a well interfacial bonding is obtained.
Qiping Kang - One of the best experts on this subject based on the ideXlab platform.
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effect of chromium carbide coating on thermal properties of short Graphite Fiber al composites
Journal of Materials Science, 2014Co-Authors: Tingting Liu, Qian Liu, Shubin Ren, Qiping Kang, Lin ZhangAbstract:A chromium carbide coating was synthesized onto Graphite Fibers by molten salts method to improve the interfacial bonding and thermal properties of short Graphite Fiber/Al composites which were fabricated by vacuum pressure infiltration technique. The Graphite Fiber/Al composites with different thicknesses of chromium carbide coatings were prepared through varying plating times to investigate the influence of chromium carbide layer on the microstructures and thermal properties of the composites. The combined Maxwell–Garnett effective medium approach and acoustic mismatch model schemes were used to theoretically predict thermal conductivities of the composites. The results indicated that the chromium carbide coating formed on Graphite Fiber surface in molten salts consists mainly of the Cr7C3 phase. The Cr7C3-coating layer with plating time of 60 min and thickness of 0.5 μm was found to be most effective in improving the interfacial bonding and decreasing the interfacial thermal resistance between Graphite Fiber and aluminum matrix. The 40 vol% Cr7C3-coated Graphite Fiber/Al composite with Cr7C3 thickness of 0.5 μm exhibited 45.4 % enhancement in in-plane thermal conductivity of 221 W m−1 K−1 compared to that of uncoated composite, as well as the coefficient of thermal expansion of 9.4 × 10−6 K−1, which made it as very interesting material for thermal management applications.
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effect of titanium carbide coating on the microstructure and thermal conductivity of short Graphite Fiber copper composites
Journal of Materials Science, 2013Co-Authors: Qian Liu, Tingting Liu, Shubin Ren, Qiping KangAbstract:Graphite Fiber–Cu composites have drawn much attention in electronic packaging due to its excellent machinability and thermal properties. However, the weak interface bonding between Graphite Fiber and copper resulted in low thermo-mechanical properties of composites. In this work, a titanium carbide coating with thickness of 0.1 μm or 1 μm was synthesized on the surface of Graphite Fiber through molten salts method to strengthen interfacial bonding. The enhanced composites present 24–43 % increase in thermal conductivity and achieve the thermal conductivity of 330–365 W m−1 K−1 as well as the coefficient of thermal expansion of 6.5 × 10−6–14 × 10−6 K−1. A Maxwell–Garnett effective medium approach on the anisotropic short Fiber reinforcement with interfacial thermal resistance was established. The obtained enhancement was in good agreement with the estimates. The results suggest that the major factor that influences the thermal conductivities is not the interfacial thermal resistance but the low thermal conductivity of Fiber in transversal direction when a well interfacial bonding is obtained.
