PREPARATION AND PROPERTIES OF NANOCRYSTALLINE Ti_(70)Ni_(20)Si_(10) ALLOY

Acta Metall Sin

1995, Vol. 31

Issue (17): 200-205 DOI:

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PREPARATION AND PROPERTIES OF NANOCRYSTALLINE Ti_(70)Ni_(20)Si_(10) ALLOY

PING Dehai; (Laborutory of Atornic Imaging of Solids; Inslitute of Metal Research; Chinese Academy of Sciences; Shenyang 110015) XIE Miansheng; JIN Zhixiong; LI Douxing; YE HenKqiang(Laboratory of Atomic Imaging of Solids;Institute of Metal Research; Cthinese Academy of Sciences; Shenyang 110015)

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Abstract Nanocrystalline Ti70ONi20Si10 alloys with average grain sizes in the range of 8─120 nm are prepared by crystallization from amorphous precursor under isothermal heat treatment for 1h in the temperature interval of 500-800℃. X-ray diffraction and TEM analysis indicated that nanocrystalline Ti70Ni20Si10 alloy consists of three phases, i.e., Ti2Ni, Ti5Si3 and α-Ti. The values of Vickers hardness of the nanocrystalline alloy are higher than that of amorphous and as-cast samples, which does not increase linearly with reducing the grain size.

Key words: Ti-Ni-Si nanocrystalline alloy annealing TEM microhardness

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1995/V31/I17/200

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