The Experts below are selected from a list of 66 Experts worldwide ranked by ideXlab platform

Bande Hong - One of the best experts on this subject based on the ideXlab platform.

  • High strain rate superplasticity of a β-Si3N4 Whisker reinforced pure aluminium composite made by squeeze casting
    Scripta Materialia, 1996
    Co-Authors: Tsunemichi Imai, Isao Tochigi, Gille L'esperance, Bande Hong
    Abstract:

    High strain rate superplasticity (HSRS) in Ceramic Whisker or particulate reinforced aluminum alloy composites is expected to offer an efficiently near-net shape forming technique to automobile, aerospace, and even semi-conductor industries, since the HSRS composites usually exhibit a total elongation of 250--600% at a high strain rate of about 0.1--10 s{sup {minus}1}. It is thought that primary deformation mechanism of the HSRS is grain boundary sliding since the composites have the fine grain size of 3{approximately}0.8 {micro}m. The purpose of this study is to develop a thermomechanical processing route to produce a fine microstructure and a HSRS in a {beta}-Si{sub 3}N{sub 4} Whisker reinforced 99.99% pure aluminum composite fabricated by squeeze casting. In addition, superplastic deformation mechanism of the composite are also discussed.

Tsunemichi Imai - One of the best experts on this subject based on the ideXlab platform.

  • High strain rate superplasticity of a β-Si3N4 Whisker reinforced pure aluminium composite made by squeeze casting
    Scripta Materialia, 1996
    Co-Authors: Tsunemichi Imai, Isao Tochigi, Gille L'esperance, Bande Hong
    Abstract:

    High strain rate superplasticity (HSRS) in Ceramic Whisker or particulate reinforced aluminum alloy composites is expected to offer an efficiently near-net shape forming technique to automobile, aerospace, and even semi-conductor industries, since the HSRS composites usually exhibit a total elongation of 250--600% at a high strain rate of about 0.1--10 s{sup {minus}1}. It is thought that primary deformation mechanism of the HSRS is grain boundary sliding since the composites have the fine grain size of 3{approximately}0.8 {micro}m. The purpose of this study is to develop a thermomechanical processing route to produce a fine microstructure and a HSRS in a {beta}-Si{sub 3}N{sub 4} Whisker reinforced 99.99% pure aluminum composite fabricated by squeeze casting. In addition, superplastic deformation mechanism of the composite are also discussed.

  • High strain rate superplasticity of a SiC particulate reinforced aluminium alloy composite by a vortex method
    Scripta Metallurgica et Materialia, 1994
    Co-Authors: Takeo Hikosaka, Tsunemichi Imai, T.g. Nieh, Jeff Wadsworth
    Abstract:

    High strain rate superplasticity (HSRS) for a Ceramic Whisker or particulate reinforced aluminum alloy composites exhibiting a total elongation of 250--600% at a high strain rate such as 0.1--10S[sup [minus]1] is expected to establish an efficient, near-net shape forming for automobile engineering components, aerospace structures and semi-conductor packagings. The purpose of this study is to establish thermomechanical processing to build fine microstructure and to produce HSRS for a SiC particulate reinforced aluminum alloy composite fabricated by a voltex method and to make clear the superplastic characteristics.

Isao Tochigi - One of the best experts on this subject based on the ideXlab platform.

  • High strain rate superplasticity of a β-Si3N4 Whisker reinforced pure aluminium composite made by squeeze casting
    Scripta Materialia, 1996
    Co-Authors: Tsunemichi Imai, Isao Tochigi, Gille L'esperance, Bande Hong
    Abstract:

    High strain rate superplasticity (HSRS) in Ceramic Whisker or particulate reinforced aluminum alloy composites is expected to offer an efficiently near-net shape forming technique to automobile, aerospace, and even semi-conductor industries, since the HSRS composites usually exhibit a total elongation of 250--600% at a high strain rate of about 0.1--10 s{sup {minus}1}. It is thought that primary deformation mechanism of the HSRS is grain boundary sliding since the composites have the fine grain size of 3{approximately}0.8 {micro}m. The purpose of this study is to develop a thermomechanical processing route to produce a fine microstructure and a HSRS in a {beta}-Si{sub 3}N{sub 4} Whisker reinforced 99.99% pure aluminum composite fabricated by squeeze casting. In addition, superplastic deformation mechanism of the composite are also discussed.

Gille L'esperance - One of the best experts on this subject based on the ideXlab platform.

  • High strain rate superplasticity of a β-Si3N4 Whisker reinforced pure aluminium composite made by squeeze casting
    Scripta Materialia, 1996
    Co-Authors: Tsunemichi Imai, Isao Tochigi, Gille L'esperance, Bande Hong
    Abstract:

    High strain rate superplasticity (HSRS) in Ceramic Whisker or particulate reinforced aluminum alloy composites is expected to offer an efficiently near-net shape forming technique to automobile, aerospace, and even semi-conductor industries, since the HSRS composites usually exhibit a total elongation of 250--600% at a high strain rate of about 0.1--10 s{sup {minus}1}. It is thought that primary deformation mechanism of the HSRS is grain boundary sliding since the composites have the fine grain size of 3{approximately}0.8 {micro}m. The purpose of this study is to develop a thermomechanical processing route to produce a fine microstructure and a HSRS in a {beta}-Si{sub 3}N{sub 4} Whisker reinforced 99.99% pure aluminum composite fabricated by squeeze casting. In addition, superplastic deformation mechanism of the composite are also discussed.

Qing Hua Chen - One of the best experts on this subject based on the ideXlab platform.

  • ZnO–AlBw-reinforced dental resin composites: the effect of pH level on mechanical properties
    RSC Advances, 2015
    Co-Authors: Jianfeng Jin, Wen Yun Zhang, Gaoyan Wei, Ailian Hao, Yumei Zhang, Qintao Wang, Qing Hua Chen
    Abstract:

    The aim of the present study was to investigate the effect of the pH level on the reinforcement of Zn-fused Ceramic Whisker composites. Zinc oxide (ZnO)-fused aluminum borate Whiskers (AlBw) were used to strengthen dental resin composites, and the pH level was found to be a pivotal parameter that determined the composite strength. Another purpose of this study was to investigate the effect of the pH level on the bending strength, elastic modulus, compressive strength and hardness of the composites at pH = 6.0, pH = 6.2, pH = 6.4, pH = 6.6 and pH = 6.8. Each mixture was thermally fused, then silanized and combined with a dental resin at a filler mass percentage of 50%. X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy were employed to characterize and analyze the AlBw, the ZnO-AlBw and the fracture surface of the resin composites. The highest bending strength (MPa) was observed for the group with pH = 6.4 (140.58 ± 12.86, n = 5), and the minimal bending strength was observed for the group with unmodified AlBw (73.20 ± 6.12, n = 5). The compressive strength and bending strength were the opposite, the group with unmodified AlBw was highest (332 ± 40, n = 5), and the group with pH = 6.4 was lowest (298 ± 20, n = 5). Reinforcement with ZnO-fused AlBw resulted in novel dental resin composites that possessed a bending strength higher than the unmodified Whiskers.

  • Effect of Modification of Aluminum Borate Whiskers with Three Methods on Flexural Properties of Dental Resin Composites
    Applied Mechanics and Materials, 2013
    Co-Authors: Yan Bo Yuan, Wen Yun Zhang, Qing Hua Chen, Yu Hong Xiao, Li Dou Yang
    Abstract:

    This study aimed to compare three different methods for the modification of aluminium borate Whiskers and investigate the effect of aluminium borate Whiskers composites on flexural properties of dental resin composites. Method A was to mix aluminium borate Whiskers and silicon dioxide (SiO2) nanoparticles directly. Method B was to modify the mixture of aluminium borate Whiskers and SiO2nanoparticles with sol-gel process of tetraethoxysilane (TEOS). Method C was to modify the aluminium borate Whiskers with SiO2nanoparticles which were repaired by sol-gel method of TEOS. The effects of the three methods were characterized by the TEM and SEM. There was a significant difference (p<0.05) in the flexural strength among three methods. Group C had a flexural strength of 149.59 ± 12.86 MPa (mean ± SD; n = 5), which is significantly higher than 95.28 ± 4.53 MPa for Group A and 123.14 ± 17.37 MPa for Group B. It is concluded that Ceramic Whisker reinforcement significantly improves the flexural properties of resin composites; different methods produce different effects.