Investigation of the mechanism of self-propagating high-temperature synthesis of TiNi

Che, Hanqing; Ma, Yan; Fan, Q.

doi:10.1007/s10853-010-5090-3

Cited by 10 publications

(8 citation statements)

References 29 publications

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“…According to the EDS analysis, light-grey regions represent the Ti 2 Ni phase (see table 1, point 2). Dark-grey regions rich in Ti (see table 1, point 2), represent the β-Ti phase and result from incomplete Ni dissolution in Ti during the SHS process [19,20]. Ti-rich regions are observed in both NiTi-(Ar) and NiTi-(N) alloys, with the latter having a higher content.…”

Section: Resultsmentioning

confidence: 99%

Mechanical properties and corrosion resistance of porous nickel titanium alloys synthesized in different reactive atmospheres

Marchenko,

Shishelova,

Baigonakova

et al. 2023

Phys. Scr.

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In the existing studies on the self-propagating high temperature synthesis of titanium nickelide, the main attention has been paid to the study of the influence of heating rate, synthesis start temperature, powder particle size, reaction gas pressure on the structure and properties of NiTi intermetallides. However, the influence of the reactive medium on the formation of surface intermetallic oxynitrides and the properties of the NiTi alloys has not been considered. In the present work, porous titanium nickelide alloys have been obtained by self-propagating high-temperature synthesis in two different reactive atmospheres, argon and nitrogen. The studies show that NiTi-(N) alloys synthesised in the nitrogen reaction atmosphere contain a large amount of brittle secondary Ti2Ni+Ti4Ni2O(N) phases which, in contrast to NiTi-(Ar), are predominantly distributed as small particles. The intergranular Ti2Ni phases in the NiTi-(Ar) alloy synthesised in the argon reaction atmosphere are observed as regions of extensive accumulation of Ti2Ni phase. The reactive nitrogen environment resulted in dispersion of the Ti2Ni phase and lower compressive strength of the porous NiTi-(N) alloy compared to NiTi-(Ar). However, both alloys have a compressive strength greater than human cancellous bone and can be successfully used for intraosseous implantation. At the same time, the porous alloys obtained in different reaction media are passive to electrochemical corrosion and resistant to dissolution in biological media containing chlorine.

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Section: Resultsmentioning

confidence: 99%

Mechanical properties and corrosion resistance of porous nickel titanium alloys synthesized in different reactive atmospheres

Marchenko,

Shishelova,

Baigonakova

et al. 2023

Phys. Scr.

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“…The average pore size was found to be around 175 μm, with the majority of pores being below 200 μm, and the maximum pore size not exceeding 1000 μm. During SHS process, the formation of porous space is known to depend much on adsorbed gases which are filtered through the reacting zone of the sample [33,38,59,60]. Intense gas release within the combustion wave occurring during exothermic reactions between Ti and Ni contributes to a temperature elevation in the zone where the structure is formed.…”

Section: Macro-and Micro-porous Structure and Permeability Of Materialsmentioning

confidence: 99%

“…Our choice of etchant was based on the analysis of literature devoted to methods for obtaining metallographic samples based on titanium and nickel alloys [33][34][35][36][37]. The etchant's composition was selected so that the Ti2Ni and Ti4Ni2(O,N,C) phases were subject to etching.…”

Section: Surface Modifications Via Etchingmentioning

confidence: 99%

“…Porous alloys based on TiNi are quite widely used as materials for implants. The combination of both high biomechanical and biochemical compatibility of TiNi-based porous materials with body tissues makes it possible to solve highly complex problems in various fields of medicine [1,[27][28][29][30][31][32][33][34]. Biocompatible porous TiNi materials for medical use are typically produced by the self-propagating high-temperature synthesis (SHS) and sintering [33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

“…The combination of both high biomechanical and biochemical compatibility of TiNi-based porous materials with body tissues makes it possible to solve highly complex problems in various fields of medicine [1,[27][28][29][30][31][32][33][34]. Biocompatible porous TiNi materials for medical use are typically produced by the self-propagating high-temperature synthesis (SHS) and sintering [33][34][35][36]. These methods permit to obtain porous materials with martensitic transformations in a wide temperature range, also with a developed structure of the pore volume, an optimal porosity of 50-70%, and an average pore size of 90-150 μm [25].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Porous SHS material based on TiNi with a microporous surface structure of its pore walls for creating an ophthalmic orbital implants

Anikeev,

Hodorenko,

Kaftaranova

et al. 2023

Preprint

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This work deals with a novel porous TiNi-based material for ophthalmic orbital implants that was produced by high-temperature synthesis (SHS) and possesses a specific microstructure of its surface pores, which makes it attractive for biomedical use in implants. After preparation via SHS, the obtained porous TiNi material was etched in acidic environment, to get rid of its surface Ti2Ni secondary-phase particles. This was found to improve the material’s surface morphology, adding micro-roughness to its macro-rough pores. As a result, cell growth tests conducted on the material demonstrated improved cell adhesion and growth kinetics on such a porous material with improved roughness. Finally, the material was tested in vivo as an ophthalmic orbital implant, demonstrating good biocompatibility, good degree of biointegration with surrounding eyeball tissues, and no signs of rejection after as long as 180 days. Thus, the novel porous TiNi-based material shows promise for its use in ophthalmic implantology, for instanse for manufacturing musculoskeletal stumps of the eyeball after evisceration, as it is biocompatible, has a high tissue-implant integration potential and demonstrates reduced risks of exposure and rejection of the implant.

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Mechanism of Self-Propagating High-Temperature Synthesis of AlB2–Al2O3 Composite Powders

et al. 2019

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Investigation of the mechanism of self-propagating high-temperature synthesis of TiNi

Cited by 10 publications

References 29 publications

Mechanical properties and corrosion resistance of porous nickel titanium alloys synthesized in different reactive atmospheres

Mechanical properties and corrosion resistance of porous nickel titanium alloys synthesized in different reactive atmospheres

Porous SHS material based on TiNi with a microporous surface structure of its pore walls for creating an ophthalmic orbital implants

Mechanism of Self-Propagating High-Temperature Synthesis of AlB2–Al2O3 Composite Powders

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