STABLE HIGH-TEMPERATURE π PHASE IN THE Fe-Mo-Cr-C SYSTEM: CRYSTALLINE STRUCTURE AND PROPERTIES

被引：2
|
作者：
Velikanova, T. A. [1 ]
机构：
[1] Natl Acad Sci Ukraine, Frantsevich Inst Problems Mat Sci, Kiev, Ukraine
来源：
POWDER METALLURGY AND METAL CERAMICS | 2017年 / 55卷 / 11-12期
关键词：
beta-Mn structure; congruent crystallization; Fe-Mo-Cr-C system; thermal expansion coefficient; microhardness; METASTABLE PHASES; ALLOYS;
D O I：
10.1007/s11106-017-9861-0
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A bulk sample of composition 51.9Fe11.1Mo26.3Cr10.7C (at.%) with beta-Mn structure is prepared and examined by X-ray diffraction, high-temperature differential thermal analysis, and light microcopy. The stable high-temperature pi phase of beta-Mn type crystallizes congruently from the liquid phase in the Fe-Mo-Cr-C system, the singular point being found at about 51.9Fe11.1Mo26.3Cr10.7C at.% and 1520 +/- 25 K. The structural characteristics of the pi phase are presented. Its thermal expansion coefficient is 14.32 center dot 10(-6) K-1 and microhardness 15.9 GPa. The pi phase is characterized by high chemical resistance to inorganic acids and their mixtures from room temperature up to the boiling point.
引用
收藏
页码：732 / 738
页数：7
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