The Experts below are selected from a list of 32913 Experts worldwide ranked by ideXlab platform
António M. Cunha - One of the best experts on this subject based on the ideXlab platform.
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Performance of chromium nitride and titanium nitride coatings during Plastic injection moulding
Surface & Coatings Technology, 2002Co-Authors: Luís Miguel Cunha, Martin Andritschky, K. Pischow, Z. Wang, A. Zarychta, A.s. Miranda, António M. CunhaAbstract:Monolithic coatings of chromium nitride, titanium nitride and multilayer titanium/chromium nitride coatings were produced by r.f. and d.c. reactive magnetron sputtering in order to determine their potential to be used as protective coatings for machinery parts of Plastic injection moulding or extruding machines. The tribological and mechanical behaviour of these coatings were studied. Monolithic coatings showed lower wear rates, measured by pin-on-disc experiments, when compared with multilayer coatings. The oxidation of the surface was also lower in monolithic coatings. The performance of the coatings during Plastic Processing was tested in a dye fitted to an injection moulding machine and using glass reinforced thermoPlastic. The wear rates of the nitride-based coatings during Plastic Processing was more than two orders of magnitude better then some traditional methods of protecting the surfaces such as hardening the steel by heat treatment, electrodepositing hard chromium or nitriding the steel surface. The physical vapour deposition coatings also showed higher corrosion protection during Plastic Processing tests.
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Performance of chromium nitride based coatings under Plastic Processing conditions
Surface & Coatings Technology, 2000Co-Authors: Luís Miguel Cunha, Martin Andritschky, K. Pischow, Z. Wang, A. Zarychta, A.s. Miranda, António M. CunhaAbstract:Chromium nitride based coatings were produced in the form of monolithic and multilayer coatings, by DC and RF reactive magnetron sputtering. These coatings were deposited onto stainless steel and tool steel substrates. Chromium nitride coatings have proved to be wear and corrosion resistant. The combination of these characteristics was necessary to protect surfaces during Plastic Processing. In order to select the best coatings, some mechanical and tribological tests were performed. Hardness and Young's modulus of the produced coatings were measured by nano-indentation, adhesion was assessed by scratch test experiments and wear was evaluated by performing pin-on-disc experiments. The behaviour of these coatings in chemically aggressive environments was studied by different corrosion experiments. The behaviour of these coatings in thermoPlastic Processing equipment was also studied. The abrasive and corrosive wear of chromium nitride based coatings was assessed under relatively high pressures and temperatures and was compared with the surface wear of hardened tool steel substrate by heat treatment, nitrided by chemical-heat treatment, or protected by hard chromium coating deposited in a galvanic way. Monolithic coatings were harder, and had higher Young modulus and adhesion when compared with multilayered coatings. Their wear resistance, measured by pin-on-disc test, was between two and three orders of magnitude higher, but multilayer coatings showed significantly better corrosion resistance. In general, monolithic and multilayer coatings have significantly better behaviour when compared with traditional processes of protecting functional surfaces for Plastic transformation equipment. The measured wear of the best performance obtained by chromium nitride based coatings can be more than two orders of magnitude lower than nitrided surfaces or hard chromium coated samples.
Luís Miguel Cunha - One of the best experts on this subject based on the ideXlab platform.
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Performance of chromium nitride and titanium nitride coatings during Plastic injection moulding
Surface & Coatings Technology, 2002Co-Authors: Luís Miguel Cunha, Martin Andritschky, K. Pischow, Z. Wang, A. Zarychta, A.s. Miranda, António M. CunhaAbstract:Monolithic coatings of chromium nitride, titanium nitride and multilayer titanium/chromium nitride coatings were produced by r.f. and d.c. reactive magnetron sputtering in order to determine their potential to be used as protective coatings for machinery parts of Plastic injection moulding or extruding machines. The tribological and mechanical behaviour of these coatings were studied. Monolithic coatings showed lower wear rates, measured by pin-on-disc experiments, when compared with multilayer coatings. The oxidation of the surface was also lower in monolithic coatings. The performance of the coatings during Plastic Processing was tested in a dye fitted to an injection moulding machine and using glass reinforced thermoPlastic. The wear rates of the nitride-based coatings during Plastic Processing was more than two orders of magnitude better then some traditional methods of protecting the surfaces such as hardening the steel by heat treatment, electrodepositing hard chromium or nitriding the steel surface. The physical vapour deposition coatings also showed higher corrosion protection during Plastic Processing tests.
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Performance of chromium nitride based coatings under Plastic Processing conditions
Surface & Coatings Technology, 2000Co-Authors: Luís Miguel Cunha, Martin Andritschky, K. Pischow, Z. Wang, A. Zarychta, A.s. Miranda, António M. CunhaAbstract:Chromium nitride based coatings were produced in the form of monolithic and multilayer coatings, by DC and RF reactive magnetron sputtering. These coatings were deposited onto stainless steel and tool steel substrates. Chromium nitride coatings have proved to be wear and corrosion resistant. The combination of these characteristics was necessary to protect surfaces during Plastic Processing. In order to select the best coatings, some mechanical and tribological tests were performed. Hardness and Young's modulus of the produced coatings were measured by nano-indentation, adhesion was assessed by scratch test experiments and wear was evaluated by performing pin-on-disc experiments. The behaviour of these coatings in chemically aggressive environments was studied by different corrosion experiments. The behaviour of these coatings in thermoPlastic Processing equipment was also studied. The abrasive and corrosive wear of chromium nitride based coatings was assessed under relatively high pressures and temperatures and was compared with the surface wear of hardened tool steel substrate by heat treatment, nitrided by chemical-heat treatment, or protected by hard chromium coating deposited in a galvanic way. Monolithic coatings were harder, and had higher Young modulus and adhesion when compared with multilayered coatings. Their wear resistance, measured by pin-on-disc test, was between two and three orders of magnitude higher, but multilayer coatings showed significantly better corrosion resistance. In general, monolithic and multilayer coatings have significantly better behaviour when compared with traditional processes of protecting functional surfaces for Plastic transformation equipment. The measured wear of the best performance obtained by chromium nitride based coatings can be more than two orders of magnitude lower than nitrided surfaces or hard chromium coated samples.
A.s. Miranda - One of the best experts on this subject based on the ideXlab platform.
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Performance of chromium nitride and titanium nitride coatings during Plastic injection moulding
Surface & Coatings Technology, 2002Co-Authors: Luís Miguel Cunha, Martin Andritschky, K. Pischow, Z. Wang, A. Zarychta, A.s. Miranda, António M. CunhaAbstract:Monolithic coatings of chromium nitride, titanium nitride and multilayer titanium/chromium nitride coatings were produced by r.f. and d.c. reactive magnetron sputtering in order to determine their potential to be used as protective coatings for machinery parts of Plastic injection moulding or extruding machines. The tribological and mechanical behaviour of these coatings were studied. Monolithic coatings showed lower wear rates, measured by pin-on-disc experiments, when compared with multilayer coatings. The oxidation of the surface was also lower in monolithic coatings. The performance of the coatings during Plastic Processing was tested in a dye fitted to an injection moulding machine and using glass reinforced thermoPlastic. The wear rates of the nitride-based coatings during Plastic Processing was more than two orders of magnitude better then some traditional methods of protecting the surfaces such as hardening the steel by heat treatment, electrodepositing hard chromium or nitriding the steel surface. The physical vapour deposition coatings also showed higher corrosion protection during Plastic Processing tests.
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Performance of chromium nitride based coatings under Plastic Processing conditions
Surface & Coatings Technology, 2000Co-Authors: Luís Miguel Cunha, Martin Andritschky, K. Pischow, Z. Wang, A. Zarychta, A.s. Miranda, António M. CunhaAbstract:Chromium nitride based coatings were produced in the form of monolithic and multilayer coatings, by DC and RF reactive magnetron sputtering. These coatings were deposited onto stainless steel and tool steel substrates. Chromium nitride coatings have proved to be wear and corrosion resistant. The combination of these characteristics was necessary to protect surfaces during Plastic Processing. In order to select the best coatings, some mechanical and tribological tests were performed. Hardness and Young's modulus of the produced coatings were measured by nano-indentation, adhesion was assessed by scratch test experiments and wear was evaluated by performing pin-on-disc experiments. The behaviour of these coatings in chemically aggressive environments was studied by different corrosion experiments. The behaviour of these coatings in thermoPlastic Processing equipment was also studied. The abrasive and corrosive wear of chromium nitride based coatings was assessed under relatively high pressures and temperatures and was compared with the surface wear of hardened tool steel substrate by heat treatment, nitrided by chemical-heat treatment, or protected by hard chromium coating deposited in a galvanic way. Monolithic coatings were harder, and had higher Young modulus and adhesion when compared with multilayered coatings. Their wear resistance, measured by pin-on-disc test, was between two and three orders of magnitude higher, but multilayer coatings showed significantly better corrosion resistance. In general, monolithic and multilayer coatings have significantly better behaviour when compared with traditional processes of protecting functional surfaces for Plastic transformation equipment. The measured wear of the best performance obtained by chromium nitride based coatings can be more than two orders of magnitude lower than nitrided surfaces or hard chromium coated samples.
A. Zarychta - One of the best experts on this subject based on the ideXlab platform.
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Performance of chromium nitride and titanium nitride coatings during Plastic injection moulding
Surface & Coatings Technology, 2002Co-Authors: Luís Miguel Cunha, Martin Andritschky, K. Pischow, Z. Wang, A. Zarychta, A.s. Miranda, António M. CunhaAbstract:Monolithic coatings of chromium nitride, titanium nitride and multilayer titanium/chromium nitride coatings were produced by r.f. and d.c. reactive magnetron sputtering in order to determine their potential to be used as protective coatings for machinery parts of Plastic injection moulding or extruding machines. The tribological and mechanical behaviour of these coatings were studied. Monolithic coatings showed lower wear rates, measured by pin-on-disc experiments, when compared with multilayer coatings. The oxidation of the surface was also lower in monolithic coatings. The performance of the coatings during Plastic Processing was tested in a dye fitted to an injection moulding machine and using glass reinforced thermoPlastic. The wear rates of the nitride-based coatings during Plastic Processing was more than two orders of magnitude better then some traditional methods of protecting the surfaces such as hardening the steel by heat treatment, electrodepositing hard chromium or nitriding the steel surface. The physical vapour deposition coatings also showed higher corrosion protection during Plastic Processing tests.
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Performance of chromium nitride based coatings under Plastic Processing conditions
Surface & Coatings Technology, 2000Co-Authors: Luís Miguel Cunha, Martin Andritschky, K. Pischow, Z. Wang, A. Zarychta, A.s. Miranda, António M. CunhaAbstract:Chromium nitride based coatings were produced in the form of monolithic and multilayer coatings, by DC and RF reactive magnetron sputtering. These coatings were deposited onto stainless steel and tool steel substrates. Chromium nitride coatings have proved to be wear and corrosion resistant. The combination of these characteristics was necessary to protect surfaces during Plastic Processing. In order to select the best coatings, some mechanical and tribological tests were performed. Hardness and Young's modulus of the produced coatings were measured by nano-indentation, adhesion was assessed by scratch test experiments and wear was evaluated by performing pin-on-disc experiments. The behaviour of these coatings in chemically aggressive environments was studied by different corrosion experiments. The behaviour of these coatings in thermoPlastic Processing equipment was also studied. The abrasive and corrosive wear of chromium nitride based coatings was assessed under relatively high pressures and temperatures and was compared with the surface wear of hardened tool steel substrate by heat treatment, nitrided by chemical-heat treatment, or protected by hard chromium coating deposited in a galvanic way. Monolithic coatings were harder, and had higher Young modulus and adhesion when compared with multilayered coatings. Their wear resistance, measured by pin-on-disc test, was between two and three orders of magnitude higher, but multilayer coatings showed significantly better corrosion resistance. In general, monolithic and multilayer coatings have significantly better behaviour when compared with traditional processes of protecting functional surfaces for Plastic transformation equipment. The measured wear of the best performance obtained by chromium nitride based coatings can be more than two orders of magnitude lower than nitrided surfaces or hard chromium coated samples.
Z. Wang - One of the best experts on this subject based on the ideXlab platform.
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Performance of chromium nitride and titanium nitride coatings during Plastic injection moulding
Surface & Coatings Technology, 2002Co-Authors: Luís Miguel Cunha, Martin Andritschky, K. Pischow, Z. Wang, A. Zarychta, A.s. Miranda, António M. CunhaAbstract:Monolithic coatings of chromium nitride, titanium nitride and multilayer titanium/chromium nitride coatings were produced by r.f. and d.c. reactive magnetron sputtering in order to determine their potential to be used as protective coatings for machinery parts of Plastic injection moulding or extruding machines. The tribological and mechanical behaviour of these coatings were studied. Monolithic coatings showed lower wear rates, measured by pin-on-disc experiments, when compared with multilayer coatings. The oxidation of the surface was also lower in monolithic coatings. The performance of the coatings during Plastic Processing was tested in a dye fitted to an injection moulding machine and using glass reinforced thermoPlastic. The wear rates of the nitride-based coatings during Plastic Processing was more than two orders of magnitude better then some traditional methods of protecting the surfaces such as hardening the steel by heat treatment, electrodepositing hard chromium or nitriding the steel surface. The physical vapour deposition coatings also showed higher corrosion protection during Plastic Processing tests.
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Performance of chromium nitride based coatings under Plastic Processing conditions
Surface & Coatings Technology, 2000Co-Authors: Luís Miguel Cunha, Martin Andritschky, K. Pischow, Z. Wang, A. Zarychta, A.s. Miranda, António M. CunhaAbstract:Chromium nitride based coatings were produced in the form of monolithic and multilayer coatings, by DC and RF reactive magnetron sputtering. These coatings were deposited onto stainless steel and tool steel substrates. Chromium nitride coatings have proved to be wear and corrosion resistant. The combination of these characteristics was necessary to protect surfaces during Plastic Processing. In order to select the best coatings, some mechanical and tribological tests were performed. Hardness and Young's modulus of the produced coatings were measured by nano-indentation, adhesion was assessed by scratch test experiments and wear was evaluated by performing pin-on-disc experiments. The behaviour of these coatings in chemically aggressive environments was studied by different corrosion experiments. The behaviour of these coatings in thermoPlastic Processing equipment was also studied. The abrasive and corrosive wear of chromium nitride based coatings was assessed under relatively high pressures and temperatures and was compared with the surface wear of hardened tool steel substrate by heat treatment, nitrided by chemical-heat treatment, or protected by hard chromium coating deposited in a galvanic way. Monolithic coatings were harder, and had higher Young modulus and adhesion when compared with multilayered coatings. Their wear resistance, measured by pin-on-disc test, was between two and three orders of magnitude higher, but multilayer coatings showed significantly better corrosion resistance. In general, monolithic and multilayer coatings have significantly better behaviour when compared with traditional processes of protecting functional surfaces for Plastic transformation equipment. The measured wear of the best performance obtained by chromium nitride based coatings can be more than two orders of magnitude lower than nitrided surfaces or hard chromium coated samples.