Carbonitriding
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. XPS, XRD and laser raman analysis of surface modified of 6150 steel substrates for the deposition of thick and adherent diamond-like carbon coatings
Although the 6150 steel has an excellent fatigue and impact resistance, it is unsuitable to operate it when the corrosion is a limited factor. We propose here a sequence of steel pre-treatment by carburizing, carbonitriding and nitriding in order to improve the poor adhesion between Diamond Like-Carbon coatings on steel. This sequence is our attempt to reduc
Mat. Res.. Publicado em: 25/02/2013
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2. Cathodic cage nitriding of AISI 409 ferritic stainless steel with the addition of CH4
AISI 409 ferritic stainless steel samples were nitrided using the cathodic cage plasma nitriding technique (CCPN), with the addition of methane to reduce chromium precipitation, increase hardness and wear resistance and reduce the presence of nitrides when compared to plasma carbonitriding. Microhardness profiles and X-Ray analysis confirm the formation of a
Materials Research. Publicado em: 24/02/2012
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3. Modificação da superfície do aço para melhorias na aderência de filmes de DLC / Steel surface modification for DLC films adhesion improvements
Em vista das excelentes propriedades físico-químicas dos filmes de carbono tipo-diamante (Diamond like Carbon-\textit{DLC}), atualmente, existe uma corrida científica e tecnológica para o desenvolvimento deste revestimento sobre superfícies metálicas em geral e, em especial, aquelas à base de ferro. A partir do momento em que se alcançarem melhorias
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/03/2011
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4. Modificação e caracterização da superfície do aço inoxidável Martensítico AISI 410 / Surface modification and characterization of the AISI 410 Martensitic stainless steel
This work deals about the surface modification of the AISI 410 martensitic stainless steel. The modification of steel surfaces is important for the improvement of its mechanical and tribological properties. Among the modification processes, there are coating, deposition of thin films, and ion implantation. The AISI 410 stainless steel is widely applied by ma
Publicado em: 2010
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5. Efeito do carbono no processo de nitrocarburização com plasma pulsado da liga metalica AISI H13 / Carbon effect on pulsed plasma nitrocarburizing process in AISI H13 tool steel
This work presents a study on the effect of the incorporation of carbon and nitrogen on he formation of a singlephase homogeneous layer, composed by e -Fe2-3(C,N) carbonitrides, on the top surface of a AISI H13 tool steel. We also present studies on the effect of the incorporation of these elements (C and N) in the microstructure and in the mechanical and ch
Publicado em: 2007
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6. Surface treatments of a iron aloy by nitrogen ions / Tratamentos de superficies de uma liga ferrosa por ions de nitrogenio
The objective of this project is to study processes of plasma surface treatment with special emphasis to the differences these techniques might show in relation to others, looking forward to understand the process from surface phenomena. Two kinds of surface treatment have been studied, including three different techniques: ion beam nitriding, pulsed plasma
Publicado em: 2006
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7. Nitretação e carbonitretação por plasma em aços inoxidáveis e suas influências nas resistências à corrosão e ao desgaste / Plasma nitriding and carbonitriding in stainless steels and their influences in the corrosion and wear resistances
Visando-se determinar as temperaturas mais adequadas de nitretação e carbonitretação por plasma dos aços inoxidáveis austenítico AISI 316L, ferrítico AISI 409 e super duplex ASTM A890 Gr 5A e suas influências nas resistências ao desgaste e à corrosão, amostras desses aços foram tratadas a 400, 450 e 500°C, e submetidas a ensaios micrográficos,
Publicado em: 2005
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8. Modelamento matemático e estudo do atrito em amostras de Ti6Al4V carbonitretadas por plasma
O objetivo desta dissertação é estudar o atrito com foco nas forças e energias necessárias para iniciar o movimento e mantê-lo. A influência das texturas das superfícies em contato no coeficiente de atrito é analisada em rugosidade, inclinação média e dimensão fractal dos perfis das superfícies. O estudo mostrou que a inclinação média dos pe
Publicado em: 2005
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9. Synthesis of Zr-Si-O-N phases by carbonitriding reaction. Characterization of crystalline phases using the Rietveld method
Zirconium compounds are of great interest for ceramic application due to their excellent thermal and mechanical properties. Zirconium phases of the system Zr-O-C-N were obtained using carbonitriding reactions of zircon mineral (ZrO2.SiO2), under different reaction conditions. The reaction products were studied by X-ray diffraction (XRD) using the Rietveld me
Materials Research. Publicado em: 2001