Production of NiAl-matrix composites by reactive sintering

被引：14

作者：

Novak, P. ^{[1
]}

Sotka, D. ^{[1
]}

Novak, M. ^{[1
]}

Michalcova, A. ^{[1
]}

Serak, J. ^{[1
]}

Vojtech, D. ^{[1
]}

机构：

[1] Inst Chem Technol, Dept Met & Corros Engn, CR-16628 Prague 6, Czech Republic

来源：

POWDER METALLURGY | 2011年 / 54卷 / 03期

关键词：

Intermetallics; Reactive sintering; High temperature alloys; Composites; Nickel aluminide; ALLOYS;

D O I：

10.1179/003258909X12518163

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

This work was devoted to the development of NiAl-matrix composite and its production by reactive sintering powder metallurgy. Various types of reinforcement (aluminium oxide, silicon and tungsten carbides, titanium silicide) were tested. The best chemical compatibility and the highest hardness and wear resistance were achieved by Al2O3 fibres. Electroless nickel plating pretreatment of Al2O3 fibres improves both distribution of fibres and hardness of the composite. However, it strongly reduces the wear resistance, probably due to phosphorus content in the nickel coating. In situ formation of NiAl-Al2O3 composites by reactive sintering of a pressed powder mixture of Ni, Al and NiO was unsuccessful. Only a small amount of cubic gamma-Al2O3 was detected after reactive sintering and hence no significant hardness increase was observed.

引用

页码：308 / 313

页数：6

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