FeAl materials from intermetallic powders

被引：58

作者：

Godlewska, E ^{[1
]}

Szczepanik, S

Mania, R

Krawlarz, J

Koziñski, S

机构：

[1] Univ Min & Met Krakow, Fac Mat Sci & Ceram, Krakow, Poland

[2] Univ Min & Met Krakow, Fac Met & Mat Sci, Krakow, Poland

来源：

INTERMETALLICS | 2003年 / 11卷 / 04期

关键词：

iron alummides (based on FeAl); powder metallurgy; reaction synthesis;

D O I：

10.1016/S0966-9795(02)00247-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

FeAl materials with the aluminium concentration of 40 at.% were prepared from intermetallic powders, obtained by milling and screening of the products of self-propagating high-temperafure synthesis (SHS), carried out in a loosely packed mixture of elemental powders. Pressureless sintering of the compacted intermetallic powders yielded porous materials that were densified by hot forming. The properties of dense bodies were strongly related to the grain size of the starting intermetallic powders. Two fractions with grain sizes of less than 25 pm and in the range from 25 to 40 put were investigated. The amount of an oxide phase distributed along the grain boundaries of the intermetallic matrix was remarkably higher in the former case. The oxide dispersions adversely affected the room temperature strength and ductility of the material. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：307 / 312

页数：6