OXIDATION-RESISTANT BORON-DOPED AND GERMANIUM-DOPED SILICIDE COATINGS FOR REFRACTORY-METALS AT HIGH-TEMPERATURE

被引：53
作者：
COCKERAM, BV
RAPP, RA
机构：
[1] Department of Materials Science and Engineering, The Ohio State University, Columbus
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1995年 / 192卷
关键词：
BORON; GERMANIUM; SILICON; REFRACTORY METALS;
D O I：
10.1016/0921-5093(95)03342-4
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Owing to the poor oxidation resistance of titanium alloys at high-temperature, a protective coating is required. Alloying titanium with enough aluminum or silicon to form a protective Al2O3 or SiO2 scale is not a viable approach. In this study, boron- and germanium-doped silicide coatings were grown on commercially pure (CP) titanium and orthorhombic-base Ti-20Al-22Nb and Ti-22Al-27Nb alloys by a halide-activated, pack cementation method. Isothermal and cyclic oxidation testing in air were used to evaluate the coated substrates at 500-1000 degrees C. Microhardness profiles were made to test for oxygen contamination of the substrate. These coatings both provided excellent oxidation resistance for CP Ti and the Ti-Al-Nb alloys.
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收藏
页码：980 / 986
页数：7
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