Plasma nitriding of Ti6Al4V alloy to improve some tribological properties

Yilbaş, Bekir Sami; Şahin, Ahmet Z.; Al‐Garni, Ahmed Z.; Said, S.A.M.; Ahmed, Zubair; Abdulaleem, B.J.; Sami, Muhammad

doi:10.1016/0257-8972(95)02472-7

Cited by 116 publications

(42 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It was reported that energetic particles of either ions or neutral atomic and molecular nitrogen would react with the metal surface to form compounds, e.g. various titanium nitride phases on a Ti substrate [42] , or supersaturated solid solution, e.g. the nitrogen-expanded austenite phase on austenitic stainless steel substrates [43][44] .…”

Section: Optical Emission Spectroscopy(oes) Of Ar and Ar/nitrogen Plasmamentioning

confidence: 99%

Effect of Nitriding Time on the Structural Evolution and Properties of Austenitic Stainless Steel Nitrided Using High Power Pulsed DC Glow Discharge Ar/N2 Plasma

Yang

Kitchen

Luo

et al. 2016

J. Coat. Sci. Technol.

View full text Add to dashboard Cite

A high power pulsed DC glow discharge plasma (HPPGDP) system was employed to perform fast nitriding of AISI 316 austenitic stainless steel in Ar and N2 atmosphere. In-situ optical emission spectroscopy and Infrared pyrometer measurements were used during the plasma nitriding to investigate the effect of dynamic plasma on the nitriding behaviour. SEM and EDX, XRD, Knoop indentation, and tribo-tests were used to characterize microstructures and properties of the nitrided austenitic stainless steel samples.HPPGDP produced high ionization of both Ar and N2in the plasma that corresponded to dense ion bombardment on the biases steel samples to induce effective plasma surface heating and to form high nitrogen concentration on the biased steel surfaces, and therefore fast nitriding (> 10µm/hour) was achieved. Various phases were identified on the nitrided stainless steel samples formed from a predominantly a single phase of nitrogen supersaturated austenite toa multi-phase structure comprising chromium nitride, iron nitride and ferrite dependent on the nitriding time. All the nitrided AISI 316 austenitic stainless steel samples were evaluated with high hardness (up to 17.3 GPa) and exceptional wear resistance sliding to against hardened steel balls and tungsten carbide balls.

show abstract

Section: Optical Emission Spectroscopy(oes) Of Ar and Ar/nitrogen Plasmamentioning

confidence: 99%

Effect of Nitriding Time on the Structural Evolution and Properties of Austenitic Stainless Steel Nitrided Using High Power Pulsed DC Glow Discharge Ar/N2 Plasma

Yang

Kitchen

Luo

et al. 2016

J. Coat. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Estudos experimentais têm demonstrado que alterações nas características superficiais do titânio podem influenciar a resposta biológica ao redor do biomaterial e, como conseqüência, o sucesso da interação célula-superfície 9,10 . Na busca por superfícies que contribuam para essa interação e supram a necessidade de obter uma boa adesão, e conseqüentemente uma maior proliferação e formação tecidual, várias pesquisas têm sido desenvolvidas, modificando estas superfícies por variados processos [11][12][13] . Dentre estes, destaca-se a nitretação iônica ou nitretação por plasma, que consiste em ionizar um gás ou mistura gasosa contendo nitrogênio, através de uma descarga luminescente gerada por uma diferença de potencial entre a amostra (cátodo) e o ânodo, em uma atmosfera a baixa pressão.…”

unclassified

“…O conceito básico no uso da nitretação iônica para melhorar as propriedades superficiais de uma liga de titânio é fundamentado na possibilidade de formar nitretos ou carbetos abaixo da superfície da liga. Os nitretos e carbetos de titânio são materiais duros que melhoram as propriedades tribológicas da superfície, ou seja, aumentam a resistência ao desgaste e a dureza superficial 13 , favorecendo a adesão e proliferação celular à superfície do material. Estes achados foram comprovados em estudos in vitro utilizando células pré-osteoblásticas MC3T3 12 e Osteo-1 15,16 .…”

unclassified

Adesão de Células do Ligamento Periodontal de Ratos a Diferentes Superfícies de Titânio: Estudo Comparativo In Vitro

ALVES¹

2011

Pesqui. bras. odontopediatria clín. integr.

View full text Add to dashboard Cite

“…On the other hand, the corrosion resistance of TiN can be affected by its structural defects (pores, holes and small cracks) [23]. In fact, Capitanu et al [26] showed that an adequate structure without defects and dense TiN film can significantly improve corrosion resistance.…”

mentioning

confidence: 99%

“…Since titanium nitrides are hard biocompatible materials [20][21][22] with excellent resistance to abrasion, more advanced processing methods have been developed in order to achieve a nitride layer on the surface of materials. At the presence of nitride in plasma [23], nitrogen atoms diffuse into the titanium matrix, forming a layer of TiN and Ti 2 N compounds, usually followed by a deeper diffusion layer. This layered structure produces a continuous profile of hardness, thus providing adequate support of the coating [21,24].…”

mentioning

confidence: 99%

A Novel Engineering Spherical Bearing, with Potential Application for a Hip Implant

Florescu¹,

Capitanu²,

Badita³

et al. 2016

JMEA

View full text Add to dashboard Cite

Abstract:It is a research which could enter into contradiction with the current trend concerning the hip implants. It is known as sliding friction, which is characteristic of present artificial hip joints, is higher than in the case of rolling friction. The paper reports the studies of the functioning mode of a novel spherical bearing MoM (metal on metal) with rolling friction, with potential application for an artificial hip joint obtained by introducing a number of balls between the femoral head and the acetabular cup. After over 15 years of research upon the functional principle and constructive solution, a version that offered a coefficient of minimum friction in the hip joint came to light. This version was based on a constructive solution of motion with lower friction, "Omnitrack ® movement solutions", which has been modified and rebuilt to be used as a joint of a total hip prosthesis-MOMJ. The joint was built entirely in stainless steel, SS316L medical grade. Tests have been carried out on the experimental laboratory devices that showed very low values of the coefficient of friction (μ = 0.0225). For validation, the prosthesis had to be put through tests for 500,000 cycles, in terms of physiological motion and dynamic loading, according to ISO 14242-3. Testing was conducted on a multiaxial dynamics machine, MTS Bionix, equipped with system for hip implant testing. The testing results of this total hip prosthesis with rolling friction have been successful in signing up for a friction moment of 0.525 kNmm which means a coefficient of friction μ = 0.0143, for a joint with femoral head diameter 28 mm.

show abstract

Plasma nitriding of Ti6Al4V alloy to improve some tribological properties

Cited by 116 publications

References 11 publications

Effect of Nitriding Time on the Structural Evolution and Properties of Austenitic Stainless Steel Nitrided Using High Power Pulsed DC Glow Discharge Ar/N2 Plasma

Effect of Nitriding Time on the Structural Evolution and Properties of Austenitic Stainless Steel Nitrided Using High Power Pulsed DC Glow Discharge Ar/N2 Plasma

Adesão de Células do Ligamento Periodontal de Ratos a Diferentes Superfícies de Titânio: Estudo Comparativo In Vitro

A Novel Engineering Spherical Bearing, with Potential Application for a Hip Implant

Contact Info

Product

Resources

About