不同氧化物对钛-铝系原位合成Al2O3晶须的影响
Effect of Different Oxide on In-situ Synthesis of Al2O3 Whiskers in Ti-Al System
摘 要
以钛粉、铝粉为基本原料,并分别添加两种氧化物通过原位反应在钛-铝基内合成Al2O3晶须;采用XRD和SEM等手段研究了不同氧化物对原位合成Al2O3晶须的影响.结果表明:添加Nb2O5后所得的晶须短而粗,约在1 100 ℃才能形成大量的晶须;添加TiO2后,约在890 ℃便可以原位合成大量的晶须,晶须长而直,表面光滑,长径比较好,但当温度过高(1 040 ℃)时,形成了粗糙的不规则柱状粗纤维.
原位合成
晶须
氧化物
添加剂
Al2O3
in-situ synthesis
whisker
oxide
additive
Abstract
Al2O3 whiskers in Ti-Al matrix were successfully synthesized by in situ reaction using Ti powders and Al powders as raw materials doped with two kinds of oxide additives.The effects of different oxides on the in-situ synthesis of Al2O3 whiskers was studied by using XRD and SEM.The results indicate that the whiskers were short and rough when Nb2O5 was added,a large number of whiskers appeared after syntheiszed at 1 100 ℃.When TiO2 was used as additive,after synthesized at 890 ℃,more and more longer and straighter whiskers having good slenderness ratio were formed.If the temperature was higher (1 040 ℃),irregular columnar fibres with rough surface were formed.
中图分类号 TB333
所属栏目 试验研究
基金项目 陕西省教育厅专项科研项目(08JK240);陕西理工学院引进人才科研启动项目(SLGQD0751)
收稿日期 2008/10/28
修改稿日期 2009/8/1
网络出版日期
作者单位点击查看
备注艾桃桃(1981-),男,陕西米脂人,讲师,硕士.
引用该论文: AI Tao-tao. Effect of Different Oxide on In-situ Synthesis of Al2O3 Whiskers in Ti-Al System[J]. Materials for mechancial engineering, 2009, 33(11): 43～45
艾桃桃. 不同氧化物对钛-铝系原位合成Al2O3晶须的影响[J]. 机械工程材料, 2009, 33(11): 43～45
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参考文献
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【2】AI Tao-tao,WANG Fen,ZHU Jian-feng.Microstructure and mechanical properties of Al2O3/TiAl composite[J].Trans Nonferrous Met Soc China,2006,16(3):1924-1927.
【3】CLAUSSEN N,WEISSKOPF K L,RüHLE M.Tetragonal zirconia polycrystals reinforced with SiC whiskers[J].J Am Ceram Soc,1986,69(3):288-292.
【4】GHOMASHCHI M R.Fabrication of near net-shaped Al-based intermetallics matrix composites[J].Journal of Materials Processing Technology,2001,112(2):227-235.
【5】王芬,艾桃桃.Ti-Al-Nb2O5系原位合成Al2O3晶须的形成机理分析[J].人工晶体学报,2006,35(6):33-37.
【6】WANG Fen,FAN Zhi-kang,ZHU Jian-feng.Reaction synthesized alumina fibers reinforced Ti-Al intermetallic matrix[J].Rare Metal Materials and Engineering,2006,35(Suppl):293-296.
【7】揭晓华,程秀,蔡莲淑,等.稀土对SiC纳米粉体机械合金化形成的影响[J].材料科学与工程学报,2004,22(1):55-58.
【8】罗三峰,王周福,王玺堂,等.稀土氧化物对碳化硅形成的影响[J].稀有金属材料与工程,2007,38(增刊):312-314.
【9】吕臣敬,王芬,张希清.原位合成Al2O3/Ti-Al复合材料的研究[J].宇航材料工艺,2005(4):47-51.
【10】王芬,李萌.稀释剂对Al2O3(f)/Ti-Al原位复合材料纤维相的影响[J].粉末冶金技术,2007,25(6):407-411.
【11】艾桃桃,王芬.Al-Ti-TiO2-Nb2O5系的热扩散法合成及热力学计算[J].特种铸造及有色合金,2006,26(11):751-754.
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