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A Potential Method for Densifying Reactive Sintered NI3AL

Published online by Cambridge University Press:  22 February 2011

Chen-Ti Hu  and
Wen-Chen Chiou
Chen-Ti Hu
Affiliation:
Department of Materials Science and Engineering, National Tsing-Hua University, Hsinchu 30043, Taiwan, R.O.C.
Wen-Chen Chiou
Affiliation:
Department of Materials Science and Engineering, National Tsing-Hua University, Hsinchu 30043, Taiwan, R.O.C.
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Abstract

A potential method to produce Ni3Al+0. 1B PM products of large dimension and as sheets, rods, tubes or other shapes with simple laboratory facilities is presented. The method includes multi-stage sintering and interstage cold deformation to collapse and to eliminate the sintering pores; most important of all, a thermally absorbing material must keep contact with the powder compacts during the preliminary reactive sintering stage to decrease the maximum temperature of the specimen and to develope the Ni2Al3 phase. The found Ni2Al3 regions with some special characteristics can be used to sustain the deformation of cold rolling more than 30% without failure. The monolithic Ni76Al24B0.1 phase is obtained after the second stage of sintering at 1200°C for 4h. At meantime, common reactive sintered specimens without a thermally absorbing material contacting were also studied and compared side by side.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 879
Copyright
Copyright © Materials Research Society 1995

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