| Improvement of intermediate-temperature oxidation resistance of Ti3AlC2 by pre-oxidation at high temperatures |
| X. H. Wang; Y. C. Zhou
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| 2003
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| 发表期刊 | Materials Research Innovations
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| ISSN | 1432-8917
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| 卷号 | 7期号:4页码:205-211 |
| 摘要 | Ti3AlC2 has good oxidation resistance at high temperatures owing to the formation of protective Al2O3 layer. However, as it is directly exposed to air at 500 degreesC and especially 600 degreesC, the scales formed on Ti3AlC2 exhibits poor protectivity because of the oxidation-induced microcracks, which limits the potential application of this technologically important material. In this work, the oxidation resistance of Ti3AlC2 at 500 degreesC and 600 degreesC was significantly improved by pre-oxidation at 1000-1300 degreesC for a short time of 2 h in air. The oxidation of the pre-oxidized Ti3AlC2 at 600 degreesC generally obeyed a parabolic rate law instead of the speed-up linear relation in the case without pre-oxidation. As revealed by X-ray diffraction, Raman spectroscopy results and SEM observations, the remarkable improvement of oxidation resistance after pre-oxidation was attributed to the protective layers formed on Ti3AlC2 during pre-oxidation, which inhibited the formation of anatase TiO2 that resulted in the oxidation-induced microcracks. Moreover, this work confirmed that the mechanism proposed previously for the anomalous oxidation of Ti3AlC2 in air at 500-600 degreesC was correct. |
| 部门归属 | chinese acad sci, inst met res, high performance ceram div, shenyang natl lab mat sci, shenyang 110016, peoples r china.;zhou, yc (reprint author), chinese acad sci, inst met res, high performance ceram div, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
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| 关键词 | Ti3alc2
Machinable Layered Ceramic
Pre-oxidation
Alumina Scales
Raman Spectroscopy
Selective Oxidation
Titanium Oxide
Liquid Reaction Synthesis
Behavior
Air
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| URL | 查看原文
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| WOS记录号 | WOS:000185459100005
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/36061
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
X. H. Wang,Y. C. Zhou. Improvement of intermediate-temperature oxidation resistance of Ti3AlC2 by pre-oxidation at high temperatures[J]. Materials Research Innovations,2003,7(4):205-211.
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| APA |
X. H. Wang,&Y. C. Zhou.(2003).Improvement of intermediate-temperature oxidation resistance of Ti3AlC2 by pre-oxidation at high temperatures.Materials Research Innovations,7(4),205-211.
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| MLA |
X. H. Wang,et al."Improvement of intermediate-temperature oxidation resistance of Ti3AlC2 by pre-oxidation at high temperatures".Materials Research Innovations 7.4(2003):205-211.
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