Ti(C,N)基金属陶瓷在900~1150℃的氧化行为
Oxidation Behavior of Ti(C,N)-Based Cermets at 900-1150℃
摘 要
为研究Ti(C,N)基金属陶瓷在高温条件下的可应用性,采用XRD、SEM、EDS等方法分析了该陶瓷在900～1 150℃的氧化行为及其机理.结果表明:在900～1 150℃范围内,陶瓷氧化程度随氧化温度的升高而显著增加,其质量增加曲线近似呈抛物线形;在900℃空气中氧化100 h后,陶瓷表面生成致密氧化膜(NiO＋TiO2),厚度小于10 μm,对基体具有保护作用;而在1 150℃条件下,在致密层氧化膜(NiO＋TiO2)表面衍生出岛状疏松层(TiO2),100 h后厚度达80 μm,氧化膜逐渐失去保护作用.
氧化行为
氧化膜
Ti(C,N)-based cermet
oxidation behavior
oxide layer
Abstract
In order to research the applicability of Ti(C,N)-based cermets at high temperatures.Oxidation behavior and mechanism at 900-1 150℃ of the lermet material were investigated by means of XRD,SEM,EDS.The results show that from 900 to 1 150℃,the oxidation degree obviously increased with the elevation of temperature,and the curves of gained mass were liner to parabola.After oxidation at 900℃ for 100 h in the air,thickness of the compact oxide layer generated on the surface of the material was less than 10 μm with composition of NiO＋TiO2,which could protect the matrix.While on the condition of 1 150℃,loose layer with the main composition TiO2 derived from the inner compact one with thickness more than 80 μm,which lost the protection to matrix gradually.
中图分类号 TB333
所属栏目 试验研究
基金项目 国家自然科学基金重点资助项目(50634060)
收稿日期 2009/6/1
修改稿日期 2010/3/20
网络出版日期
作者单位点击查看
备注姚振华(1984-),男,湖北武汉人,博士研究生.
引用该论文: YAO Zhen-hua,XIONG Wei-hao,YE Da-meng,QU Jun. Oxidation Behavior of Ti(C,N)-Based Cermets at 900-1150℃[J]. Materials for mechancial engineering, 2010, 34(7): 1～4
姚振华,熊惟皓,叶大萌,瞿峻. Ti(C,N)基金属陶瓷在900~1150℃的氧化行为[J]. 机械工程材料, 2010, 34(7): 1～4
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参考文献
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【6】FENG P,XIONG W H,LI P,et al.Characterization of phase transformation and microstructure of nano hard phase Ti(C,N)-based cermets by spark plasma sintering[J].Chin J Nonferrous Met,2004,14(3):510-515.
【7】ZHANG X B,LIU N,RONG C L.Effect of molybdenum content on the microstructure and mechanical properties of ultra-fine Ti(C,N)-based cermets[J].Mater Charact,2008,59(12):1690-1696.
【8】刘文俊,熊惟皓,郑勇.Ti(C,N)基金属陶瓷断口形貌及增韧机理[J].中国有色金属学报,2006,16(5):800-804.
【9】MONTEVERDE F,MEDRI V,BELLOSI A.Microstructure of hot-pressed Ti(C,N)-based cermets[J].J Eur Ceram Soc,2002,22(14/15):2587-2593.
【10】赵能伟,郑勇,刘林艳,等.Ti(C,N)基金属陶瓷力学性能和高温抗氧化性能的研究[J].硬质合金,2007,24(3):134-139.
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【12】张小农,李超,李小璀,等.原位自生成TiC/TiC基复合材料的高温氧化[J].稀有金属材料与工程,2004,33(3):258-261.
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【14】陶斌武,刘建华,李松海.形状记忆合金Ti44Ni47Nb49的高温抗氧化性[J].金属学报,2005,41(6):633-637.
【15】QIAN X Q,LI Y B,HE X D,et al.Cyclic oxidation beha-vior of TiC/Ti3AlC2 composites at 550-950℃ in air[J].Journal of Alloys and Composands,2010,491(1/2):386-390.
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