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Formation, Mechanical and Electrical Properties of Ni-based Amorphous alloys and their Nanocrystalline Structure

Published online by Cambridge University Press:  11 February 2011

Xiangcheng Sun  and
Tiemin Zhao
Xiangcheng Sun
Affiliation:
Center for Materials for Information Technology, The University of Alabama, uscaloosa, Alabama, 35487–0209
Tiemin Zhao
Affiliation:
Lab of RSA, Institute of Metal Research, CAS, Shenyang, P. R. China
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Abstract

A Ni-based amorphous alloy in Ni60Ti20Zr20 system was prepared by melting spinning. The glass transition temperature (Tg) was as high as about 760 K, the supercooled liquid region was quite wide, ΔTx = 50 K (ΔTx= Tx-Tg, Tx crystallization temperature), and the reduced glass transition temperature (Tg/Tm) was 0.60. The amorphous alloys exhibited a high tensile strength (of= 1015 MPa) at room temperature. The electrical conductivity obeyed a T12 law over the range of 15 K< T < 300 K, which can be explained by an electron-electron interaction model. After annealing the amorphous alloy into primary crystallization, a nanocomposites consisted of metastable Ti2Ni and Zr2Ni nanophases with size less than 15 nm embedded in the amorphous matrix was appeared.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 740: Symposium I – Nanomaterials for Structural Applications , 2002 , I10.4
Copyright
Copyright © Materials Research Society 2003

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