Phase composition and properties of sintered specimens pressed from a nickel-Titanium powder mixture

Aksënov, G. I.; Drozdov, I. A.; Sorokin, A. A.; Chernov, D. B.; Atyakshev, Yu. A.

doi:10.1007/bf00791666

Cited by 9 publications

(2 citation statements)

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“…In comparison, green porosity down to 20% along with sintered porosity just in the order of 12% has been achieved with higher pressures of 155～ 929MPa. [4][5][6]10 With increasing TiH 2 content the green porosity increases. This is because the addition of TiH 2 has two contradictory influences on the green porosity.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, porous NiTi alloy has excellent mechanical properties, good corrosion resistance and biocompatibility, along with shape memory effect. 1 There are many reports [2][3][4][5][6][7] about the preparation of NiTi alloy by powder metallurgy, however most of these studies focus on the homogeneous compact NiTi alloy but not on the medical porous one. The lack of comprehensive reports on the porous NiTi alloy produced from EPS is the main motivation of this paper.…”

Section: Introductionmentioning

confidence: 99%

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Porous NiTi alloy prepared from elemental powder sintering

Rong

1998

J. Mater. Res.

109

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An elemental powder sintering (EPS) technique has been developed for the synthesis of porous NiTi alloy, in which Ni and Ti powders are used as the reactants and TiH2 powder is added as a pore-forming agent and active agent. Effects of various experimental parameters (sintering temperature, sintering time, and TiH2 content) on the porosity, pore size, and pore distribution as well as phase composition in experimental alloys are investigated. It is found that in order to avoid the formation of carcinogenic pure Ni phase, the porous NiTi alloy should be synthesized over a temperature of 1223 K. This gives NiTi as the main phase without any elemental phase. Substitution of Ti by TiH2 is more economic and more favorable to obtain homogeneous porous NiTi alloy. A proper selection of initial powders, ball-milling, pressing, and sintering process makes it possible to achieve the porous NiTi alloy with desired properties.

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Section: Discussionmentioning

confidence: 99%