The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform
P H Mayrhofer - One of the best experts on this subject based on the ideXlab platform.
-
thermal stability and oxidation resistance of arc evaporated tialn taaln tialtan and tialn taaln Coatings
Surface & Coatings Technology, 2014Co-Authors: C M Koller, Robert Hollerweger, C Sabitzer, Richard Rachbauer, S Kolozsvari, J Paulitsch, P H MayrhoferAbstract:Abstract Phase stability and oxidation resistance are main objectives when synthesising hard and protective Coatings for applications requiring also high thermal stability. Even though TiAlN is a well-studied and nowadays widely used high Performance Coating, the demand for further optimisation is omnipresent. Recent investigations on quaternary compounds demonstrate that the alloying of Ta to TiAlN films not only results in enhanced phase stability, but also in a significantly increased oxidation resistance. In this study we address thermal investigations of reactive cathodic arc evaporated Coatings and elucidate the diverse Performance of monolithically grown TiAlN, TaAlN, TiAlTaN, and a multilayered architecture of TiAlN and TaAlN layers. Subtle variations of the bilayer period between 30 and 38 nm were realised by varying the arc current at the TaAl cathode. Our research demonstrates that the quaternary Ti 0.45 Al 0.36 Ta 0.19 N and the multilayered TiAlN/TaAlN Coatings feature enhanced mechanical properties and thermal stability as compared with their monolithically grown constituents Ti 0.54 Al 0.46 N and Ta 0.89 Al 0.11 N. All Coatings synthesised exhibit as-deposited hardness values of 32 ± 1 GPa, but only the quaternary Ti 0.45 Al 0.36 Ta 0.19 N and the multilayered TiAlN/TaAlN Coatings demonstrate pronounced age-hardening with peak hardness values of 37 ± 2 and 35 ± 2 GPa for annealing temperatures of ~ 1000 and 1100 °C, respectively. Complementary X-ray diffraction and differential scanning calorimetry confirm their enhanced phase stability. Even though, also the multilayered design shifts the formation of wurtzite-structured AlN to higher temperatures, only quaternary Ti 0.45 Al 0.36 Ta 0.19 N could withstand ambient air oxidation at 850 °C for 20 h. This is based on the ability of forming a nearly single-phased dense protective mixed oxide scale, having an outermost Al-rich composition. Approximately 70% of this quaternary nitride remained unaffected from oxidation. With the present study we conclusively demonstrate that thermomechanical properties of cathodic arc deposited TiAlN Coatings can significantly be enhanced by either forming a quaternary compound or sophisticated architectural design with tantalum, both allow for wide-ranged industrial applications.
Chintan Patel - One of the best experts on this subject based on the ideXlab platform.
-
effective cost saving in high Performance Coating by replacing titanium dioxide with calcium aluminium silicate magnesium aluminum silicate
Paintindia, 2006Co-Authors: Hitesh Hirani, Ashok Dighe, Chintan PatelAbstract:Titanium dioxide is the brightest, whitest pigment available. TiO 2 is one of the most widely used pigments in paint, plastics, textiles, cosmetics, and paper industries.' It efficiently scatters visible light thereby imparting whiteness, brightness and opacity to paint and Coating material. The cost of TiO 2 is increasing steadily and thus the cost of paint with minimum operational margin. The partial replacement of the TiO 2 Pigment with the use of less expensive subsidiary product will give some cost advantage. In the present scenario high Performance Coatings are most widely used to preserve industrial equipment, pipelines, plant and buildings from deterioration by exposure to water, chemicals or weather which find application in automotive, industries and industrial structures, iron, steel and concrete structure, ships and marine structures, reactors, pipelines, machinery components etc. The present work emphasises on the partial replacement of TiO 2 pigment with Calcium Aluminum Silicate (CAS) and Magnesium Aluminum Silicate (MAS) in high Performance Coating application without affecting the quality of Coating. Different Performance Coatings were prepared with partial replacement of TiO 2 with CAS & MAS and analyzed for important optical properties like opacity, whiteness, Gloss and brightness. The mechanical properties were also evaluated for these Coatings. The CAS & MAS fillers showed potential of replacing 5 - 30% by weight of TiO 2 in different types of Performance Coatings.
-
Effective cost saving in high Performance Coating by replacing titanium dioxide with calcium aluminium silicate & magnesium aluminum silicate
2006Co-Authors: Hitesh Hirani, Ashok Dighe, Chintan PatelAbstract:Titanium dioxide is the brightest, whitest pigment available. TiO 2 is one of the most widely used pigments in paint, plastics, textiles, cosmetics, and paper industries.' It efficiently scatters visible light thereby imparting whiteness, brightness and opacity to paint and Coating material. The cost of TiO 2 is increasing steadily and thus the cost of paint with minimum operational margin. The partial replacement of the TiO 2 Pigment with the use of less expensive subsidiary product will give some cost advantage. In the present scenario high Performance Coatings are most widely used to preserve industrial equipment, pipelines, plant and buildings from deterioration by exposure to water, chemicals or weather which find application in automotive, industries and industrial structures, iron, steel and concrete structure, ships and marine structures, reactors, pipelines, machinery components etc. The present work emphasises on the partial replacement of TiO 2 pigment with Calcium Aluminum Silicate (CAS) and Magnesium Aluminum Silicate (MAS) in high Performance Coating application without affecting the quality of Coating. Different Performance Coatings were prepared with partial replacement of TiO 2 with CAS & MAS and analyzed for important optical properties like opacity, whiteness, Gloss and brightness. The mechanical properties were also evaluated for these Coatings. The CAS & MAS fillers showed potential of replacing 5 - 30% by weight of TiO 2 in different types of Performance Coatings.
C M Koller - One of the best experts on this subject based on the ideXlab platform.
-
thermal stability and oxidation resistance of arc evaporated tialn taaln tialtan and tialn taaln Coatings
Surface & Coatings Technology, 2014Co-Authors: C M Koller, Robert Hollerweger, C Sabitzer, Richard Rachbauer, S Kolozsvari, J Paulitsch, P H MayrhoferAbstract:Abstract Phase stability and oxidation resistance are main objectives when synthesising hard and protective Coatings for applications requiring also high thermal stability. Even though TiAlN is a well-studied and nowadays widely used high Performance Coating, the demand for further optimisation is omnipresent. Recent investigations on quaternary compounds demonstrate that the alloying of Ta to TiAlN films not only results in enhanced phase stability, but also in a significantly increased oxidation resistance. In this study we address thermal investigations of reactive cathodic arc evaporated Coatings and elucidate the diverse Performance of monolithically grown TiAlN, TaAlN, TiAlTaN, and a multilayered architecture of TiAlN and TaAlN layers. Subtle variations of the bilayer period between 30 and 38 nm were realised by varying the arc current at the TaAl cathode. Our research demonstrates that the quaternary Ti 0.45 Al 0.36 Ta 0.19 N and the multilayered TiAlN/TaAlN Coatings feature enhanced mechanical properties and thermal stability as compared with their monolithically grown constituents Ti 0.54 Al 0.46 N and Ta 0.89 Al 0.11 N. All Coatings synthesised exhibit as-deposited hardness values of 32 ± 1 GPa, but only the quaternary Ti 0.45 Al 0.36 Ta 0.19 N and the multilayered TiAlN/TaAlN Coatings demonstrate pronounced age-hardening with peak hardness values of 37 ± 2 and 35 ± 2 GPa for annealing temperatures of ~ 1000 and 1100 °C, respectively. Complementary X-ray diffraction and differential scanning calorimetry confirm their enhanced phase stability. Even though, also the multilayered design shifts the formation of wurtzite-structured AlN to higher temperatures, only quaternary Ti 0.45 Al 0.36 Ta 0.19 N could withstand ambient air oxidation at 850 °C for 20 h. This is based on the ability of forming a nearly single-phased dense protective mixed oxide scale, having an outermost Al-rich composition. Approximately 70% of this quaternary nitride remained unaffected from oxidation. With the present study we conclusively demonstrate that thermomechanical properties of cathodic arc deposited TiAlN Coatings can significantly be enhanced by either forming a quaternary compound or sophisticated architectural design with tantalum, both allow for wide-ranged industrial applications.
Hitesh Hirani - One of the best experts on this subject based on the ideXlab platform.
-
effective cost saving in high Performance Coating by replacing titanium dioxide with calcium aluminium silicate magnesium aluminum silicate
Paintindia, 2006Co-Authors: Hitesh Hirani, Ashok Dighe, Chintan PatelAbstract:Titanium dioxide is the brightest, whitest pigment available. TiO 2 is one of the most widely used pigments in paint, plastics, textiles, cosmetics, and paper industries.' It efficiently scatters visible light thereby imparting whiteness, brightness and opacity to paint and Coating material. The cost of TiO 2 is increasing steadily and thus the cost of paint with minimum operational margin. The partial replacement of the TiO 2 Pigment with the use of less expensive subsidiary product will give some cost advantage. In the present scenario high Performance Coatings are most widely used to preserve industrial equipment, pipelines, plant and buildings from deterioration by exposure to water, chemicals or weather which find application in automotive, industries and industrial structures, iron, steel and concrete structure, ships and marine structures, reactors, pipelines, machinery components etc. The present work emphasises on the partial replacement of TiO 2 pigment with Calcium Aluminum Silicate (CAS) and Magnesium Aluminum Silicate (MAS) in high Performance Coating application without affecting the quality of Coating. Different Performance Coatings were prepared with partial replacement of TiO 2 with CAS & MAS and analyzed for important optical properties like opacity, whiteness, Gloss and brightness. The mechanical properties were also evaluated for these Coatings. The CAS & MAS fillers showed potential of replacing 5 - 30% by weight of TiO 2 in different types of Performance Coatings.
-
Effective cost saving in high Performance Coating by replacing titanium dioxide with calcium aluminium silicate & magnesium aluminum silicate
2006Co-Authors: Hitesh Hirani, Ashok Dighe, Chintan PatelAbstract:Titanium dioxide is the brightest, whitest pigment available. TiO 2 is one of the most widely used pigments in paint, plastics, textiles, cosmetics, and paper industries.' It efficiently scatters visible light thereby imparting whiteness, brightness and opacity to paint and Coating material. The cost of TiO 2 is increasing steadily and thus the cost of paint with minimum operational margin. The partial replacement of the TiO 2 Pigment with the use of less expensive subsidiary product will give some cost advantage. In the present scenario high Performance Coatings are most widely used to preserve industrial equipment, pipelines, plant and buildings from deterioration by exposure to water, chemicals or weather which find application in automotive, industries and industrial structures, iron, steel and concrete structure, ships and marine structures, reactors, pipelines, machinery components etc. The present work emphasises on the partial replacement of TiO 2 pigment with Calcium Aluminum Silicate (CAS) and Magnesium Aluminum Silicate (MAS) in high Performance Coating application without affecting the quality of Coating. Different Performance Coatings were prepared with partial replacement of TiO 2 with CAS & MAS and analyzed for important optical properties like opacity, whiteness, Gloss and brightness. The mechanical properties were also evaluated for these Coatings. The CAS & MAS fillers showed potential of replacing 5 - 30% by weight of TiO 2 in different types of Performance Coatings.
J Paulitsch - One of the best experts on this subject based on the ideXlab platform.
-
thermal stability and oxidation resistance of arc evaporated tialn taaln tialtan and tialn taaln Coatings
Surface & Coatings Technology, 2014Co-Authors: C M Koller, Robert Hollerweger, C Sabitzer, Richard Rachbauer, S Kolozsvari, J Paulitsch, P H MayrhoferAbstract:Abstract Phase stability and oxidation resistance are main objectives when synthesising hard and protective Coatings for applications requiring also high thermal stability. Even though TiAlN is a well-studied and nowadays widely used high Performance Coating, the demand for further optimisation is omnipresent. Recent investigations on quaternary compounds demonstrate that the alloying of Ta to TiAlN films not only results in enhanced phase stability, but also in a significantly increased oxidation resistance. In this study we address thermal investigations of reactive cathodic arc evaporated Coatings and elucidate the diverse Performance of monolithically grown TiAlN, TaAlN, TiAlTaN, and a multilayered architecture of TiAlN and TaAlN layers. Subtle variations of the bilayer period between 30 and 38 nm were realised by varying the arc current at the TaAl cathode. Our research demonstrates that the quaternary Ti 0.45 Al 0.36 Ta 0.19 N and the multilayered TiAlN/TaAlN Coatings feature enhanced mechanical properties and thermal stability as compared with their monolithically grown constituents Ti 0.54 Al 0.46 N and Ta 0.89 Al 0.11 N. All Coatings synthesised exhibit as-deposited hardness values of 32 ± 1 GPa, but only the quaternary Ti 0.45 Al 0.36 Ta 0.19 N and the multilayered TiAlN/TaAlN Coatings demonstrate pronounced age-hardening with peak hardness values of 37 ± 2 and 35 ± 2 GPa for annealing temperatures of ~ 1000 and 1100 °C, respectively. Complementary X-ray diffraction and differential scanning calorimetry confirm their enhanced phase stability. Even though, also the multilayered design shifts the formation of wurtzite-structured AlN to higher temperatures, only quaternary Ti 0.45 Al 0.36 Ta 0.19 N could withstand ambient air oxidation at 850 °C for 20 h. This is based on the ability of forming a nearly single-phased dense protective mixed oxide scale, having an outermost Al-rich composition. Approximately 70% of this quaternary nitride remained unaffected from oxidation. With the present study we conclusively demonstrate that thermomechanical properties of cathodic arc deposited TiAlN Coatings can significantly be enhanced by either forming a quaternary compound or sophisticated architectural design with tantalum, both allow for wide-ranged industrial applications.
