Improved properties of Ti6Al4V by means of nitrogen high temperature plasma based ion implantation

Oliveira, R. M.; Mello, C.B.; Silva, Gabriel Natividade da; Gonçalves, J.A.N.; Ueda, M.; Pichon, L.

doi:10.1016/j.surfcoat.2011.03.029

Cited by 31 publications

(15 citation statements)

References 13 publications

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“…steels, Ni-based alloys, CoCr alloys with a face cubic centred FCC c N phase). Such nitriding leads to the formation of thick nitrided layers (of few lm after few hours of treatment), consisting of a supersaturated nitrogen solution in the a c N matrix, usually called expanded S-phase or a c N [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Use of combination of accelerator-based ion-beam analysis techniques to the investigation of the corrosion behavior of CoCrMo alloy

Noli

Μisaelides

Lagoyannis

et al. 2014

Nuclear Instruments and Methods in Physics Research Section B:

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a b s t r a c tNuclear Reaction Analysis -NRA in combination with d-RBS (E d : 1.35 MeV) was applied in order to investigate the corrosion behavior of CoCrMo alloy. The corrosion resistance of the alloy was compared to that of modified CoCrMo samples by several techniques as plasma nitriding and oxidizing at moderate temperature ($400°C). Electrochemical techniques in simulated body fluid 0.9% NaCl (37°C) were applied in order to accelerate the corrosion process. The nitrogen depth distribution before and after the corrosion was determined using the 14 N(d,a) 12 C and the 14 N(d,p) 15 N nuclear reactions whereas the oxygen by the 16 O(d,p) 17 O. The surface morphology and microstructure was investigated using microscopy techniques.It was found that surface treatments produce thick nitrided layers (5-6 lm) consisting of a supersaturated nitrogen solution (nitrogen concentration is $30 at.%) in the matrix (expanded phase c N ) and a thin oxygen solution (0.3 lm). The samples subjected to plasma nitridation and oxidation exhibited the lowest deterioration and better resistance to corrosion compared to the single nitrided or single oxidized and the untreated material. This could be attributed to the modified surface region with the high nitrogen content and the presence of oxygen.

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Section: Introductionmentioning

confidence: 99%

Use of combination of accelerator-based ion-beam analysis techniques to the investigation of the corrosion behavior of CoCrMo alloy

Noli

Μisaelides

Lagoyannis

et al. 2014

Nuclear Instruments and Methods in Physics Research Section B:

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“…Nitrogen PBII was carried out in a stable heating source (200-1000 o C) [51]. Calcium oxide, strontium and barium cathode were used to produce electrons, that help with nitrogen ionization and sample heating.…”

Section: Grit Blastingmentioning

confidence: 99%

Enhancing the Properties of Ti6Al4V as a Biomedical Material: A Review

Annamalai¹,

Kavitha²,

Ramji³

2014

TOMSJ

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Abstract:The alloy Ti 6 Al 4 V has evolved as a good biomedical material, by virtue of its bio-compatibility. In order to make implants out of this material, it has to be shaped and processed. Shaping this material by conventional manufacturing methods like machining, welding and brazing presents a huge challenge. This challenge has been met by various approaches like additive manufacturing, surface alloying and heat treatment. Additive manufacturing processes are used for shaping; coatings and surface alloying are used for property improvement; heat treatment is used for improving the machinability. The processing method has an impact on the final properties of the product. This review attempts to trace the development of methods and practices for converting Ti 6 Al 4 V into a useful material for biomedical applications.

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“…7. Para cada condição, a taxa de desgaste foi calculada de acordo com a norma ASTM G-99 (12) . Houve redução do coeficiente de fricção médio (cfm) que variou de 0,73 (padrão) para 0,25, referente às amostras implantadas a 650 °C, enquanto o desgaste foi reduzido em 84%.…”

Section: Atrito E Desgasteunclassified

Análise Das Propriedades Superficiais Do Aço Inoxidável Abnt 304 Modificado Por Implantação Iônica Por Imersão Em Plasma De Nitrogênio Em Alta Temperatura

Mariano

2014

RBAV

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ResumoAmostras da liga de aço inoxidável ABNT 304 foram tratadas por implantação iônica por imersão em plasma (3IP) de nitrogênio em duas condições de temperatura: 480°C e 650°C. As superfícies modificadas foram analisadas por Difratometria de Raios X (DRX), Microscopia Eletrônica de Varredura (MEV) e Microscopia de Força Atômica (MFA). A dureza, o comportamento tribológico e de corrosão foram avaliados através de ensaios de microdureza Vickers, ensaio pino sobre disco e de polarização potenciodinâmica, respectivamente. Apesar de ter sido observada a precipitação de cromo em contornos de grãos do aço, o que evidentemente reduziu sua resistência à corrosão, foram identificados picos intensos de austenita expandida nas amostras tratadas a 650°C, as quais apresentaram valores de dureza mais elevados e boa resistência ao desgaste quando comparadas às amostras tratadas a 480°C. Palavras-chave:Implantação iônica por imersão em plasma; Aço inoxidável; Austenita expandida. Abstract Samples of AISI 304 stainless steel alloy were treated via nitrogen high temperature plasma immersion ion implantation (PIII) in two different experimental conditions: at 480°C and 650°C. The modified surfaces properties were analyzed by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). Hardness, tribological and corrosion behaviors were evaluated by means of microhardness Vickers and pin-on-disk tests

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Improved properties of Ti6Al4V by means of nitrogen high temperature plasma based ion implantation

Cited by 31 publications

References 13 publications

Use of combination of accelerator-based ion-beam analysis techniques to the investigation of the corrosion behavior of CoCrMo alloy

Use of combination of accelerator-based ion-beam analysis techniques to the investigation of the corrosion behavior of CoCrMo alloy

Enhancing the Properties of Ti6Al4V as a Biomedical Material: A Review

Análise Das Propriedades Superficiais Do Aço Inoxidável Abnt 304 Modificado Por Implantação Iônica Por Imersão Em Plasma De Nitrogênio Em Alta Temperatura

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