Effect of Oxygen on High-temperature Phase Equilibria in Ternary Ti-Al-Nb Alloys

被引：9

作者：

Distl, Benedikt ^{[1
]}

Dehm, Gerhard ^{[1
]}

Stein, Frank ^{[1
]}

机构：

[1] Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany

来源：

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 2020年 / 646卷 / 14期

基金：

欧盟地平线“2020”;

关键词：

Ti-Al alloys; Octahedral voids; Interstitial atoms; Aluminum; Oxygen solubility; TRANSFORMATION; OXIDATION; DESIGN; SYSTEM; GAMMA; HCP;

D O I：

10.1002/zaac.202000098

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Alloys based on titanium aluminides received a lot of attention because of their capability to substitute Ni-based superalloys in high-temperature applications. However, the phase equilibria between the main microstructure constituents (alpha Ti), (beta Ti), gamma (TiAl) and alpha(2)(Ti3Al) can be shifted significantly by impurities such as oxygen especially at high temperatures. This behavior is investigated on the tie-triangle (alpha Ti) + (beta Ti) + gamma (TiAl) in the ternary Ti-Al-Nb system at 1300 degrees C. An explanation for this behavior could be the occupation of octahedral voids by impurities in certain phases.

引用

页码：1151 / 1156

页数：6

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