等离子喷涂用纳米Al2O3/TiO2团聚粉体的制备
Preparation of Agglomerated Al2O3/TiO2 Nanocrystalline Powders for Plasma Spraying
摘 要
采用喷雾造粒技术制备出纳米Al2O3/TiO2团聚粉体,使用高温电炉通过三种不同制度进行了烧结;测定了其松装密度与流动性,用X射线衍射方法分析了其相组成,用扫描电镜分析了团聚粉体的形貌,并进行了等离子喷涂试验.结果表明:两步烧结法所得纳米团聚粉体的致密度与结合强度高,适于等离子喷涂,可以获得高质量的纳米涂层.
纳米团聚粉体
烧结
plasma spray
agglomerated nanocrystalline powder
sintering
Abstract
Agglomerated Al2O3/TiO2 nanocrystalline powders formed via spray-drying were sintered in high temperature electric furnace with three sintering procedures.Free holding density and flowability were measured.X-ray diffraction(XRD) was used to analyze phase constituent.Scanning electron microscopy(SEM) was used to examine the morphology.The experiments of plasma spraying were tried on.It is showed that the density and bonding strength of the agglomerated nanocrystalline powders derived from two-step sintering are high,and they are suitable for plasma spraying to obtain nanostructured coating of good quality.
中图分类号 TB383
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收稿日期 2006/7/28
修改稿日期 2007/1/5
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备注路学成(1978-),男,河南平舆人,讲师,硕士研究生.
引用该论文: LU Xue-cheng,YAN Dian-ran,ZHANG Jian-xin,HE Ji-ning,DONG Yan-chun. Preparation of Agglomerated Al2O3/TiO2 Nanocrystalline Powders for Plasma Spraying[J]. Materials for mechancial engineering, 2007, 31(6): 63～66
路学成,阎殿然,张建新,何继宁,董艳春. 等离子喷涂用纳米Al2O3/TiO2团聚粉体的制备[J]. 机械工程材料, 2007, 31(6): 63～66
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参考文献
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【2】Tjong S C,Chen Haydn.Nanocrystalline materials and coatings[J].Materials Science and Engineering R,2004(45):81-88.
【3】Maurice Gell.Application opportunities for nanostructured materials and coatings[J].Materials Science and Engineering A,1995(20):246-251.
【4】孙兰,贾成广,曹瑞军.纳米粉末烧结的研究现状及前景[J].粉末冶金技术,2006,24(2):146-150.
【5】果世驹.粉末烧结理论[M].北京:冶金工业出版社,1998.
【6】Pei Zeng.Computer simulation of nanoparticle sintering[D].Connecticut:University of Connecticut,1999.
【7】Lukasz Zych,Krzysztof Haberko.Filter pressing and sintering of a zirconia nanopowder[J].Journal of the European Ceramic Society,2006(26):373-378.
【8】Stutt P R.Thermal spray of nanostructured alumina/titania coating with improved mechanical properties[C]//99’ Wuhan International Conference on Surface Engineering.Wuhan:1999:142-146.
【9】Leon L S,Gobermana U D,Ruiming R,et al.The dependency of microstructure and properties of nanostructured coatings on plasma spray conditions[J].Surface and Coatings Technology,2000(130):1-8.
【10】Priscille Roy,Ghislaine Bertrand,Christian Coddet.Spray drying and sintering of zirconia based hollow powders[J].Powder Technology,2005(157):20-26.
【11】Chen I,Wang X.Sintering dense nanocrystalline ceramics without stage grain growth[J].Nature,2000,404(3):168-171.
【12】雷燕,熊惟皓.陶瓷材料纳米烧结研究进展[J].材料导报,2003,17(5):28-30.
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