An investigation of the Pt-Al-Ru diagram to facilitate alloy development

被引：16

作者：

Biggs, T

Hill, PJ

Cornish, LA

Witcomb, MJ ^{[1
]}

机构：

[1] Mintek, Div Phys Met, ZA-125 Randburg, South Africa

[2] Univ Witwatersrand, Sch Proc Engn, ZA-2050 Wits, South Africa

[3] Univ Witwatersrand, Electron Microscope Unit, ZA-2050 Wits, South Africa

来源：

JOURNAL OF PHASE EQUILIBRIA | 2001年 / 22卷 / 03期

关键词：

Addition reactions - Composition - Corrosion resistance - Martensitic transformations - Mixtures - Optical microscopy - Phase diagrams - Phase equilibria - Ruthenium - Scanning electron microscopy - Solid solutions - Solubility;

D O I：

10.1361/105497101770338671

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：

The platinum-rich region of the Pt-Al-Ru system was investigated with a view to stabilizing the displacive (martensite-type) transformation in Pt3Al. In the alloys with low ruthenium contents, ruthenium was found to be partitioned almost exclusively to the fee Pt phase with extremely limited solubility in Pt3Al. The low-temperature D0(C)' form of Pt3Al was found to co-exist with the Pt phase. At high Ru additions (greater than 20 at.%), a two-phase mixture of an hcp Ru solid solution and the high-temperature Ll(2) form of Pt3Al was observed. No ternary phases were observed in any of the alloys studied.

引用

页码：214 / 218

页数：5

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