铁颗粒在等离子喷涂过程中的氧化行为
Oxidation Behavior of Iron Particles during Plasma Spray
摘 要
采用等离子喷涂技术在不同喷涂距离下进行铁颗粒喷涂,使用扫描电子显微镜分析了经历不同喷涂距离后铁颗粒和涂层的形貌,利用氮氧分析仪测定了铁颗粒和涂层中的氧含量,分析了在喷涂过程中铁颗粒的氧化行为.结果表明:铁颗粒在飞行过程中存在扩散氧化和对流氧化两种氧化机制,对铁颗粒来说,当喷涂距离在50 mm内时以对流氧化为主,当喷涂距离超过50 mm后时将以扩散氧化为主;除飞行中的氧化外,在喷涂过程中还发生形成涂层后的氧化,铁颗粒在飞行过程中的氧化程度和形成涂层后的基本相当.
铁颗粒
氧化机理
plasma spray
iron particle
oxidation mechanism
Abstract
Using plasma spray technology iron particles were sprayed with different spray distances to prepare coatings.The surface and cross-setcion morphology of iron particles and coatings were investigated by scanning electron microscopy (SEM).The oxygen contents of particles and coatings were determined by nitrogen-oxygen determinator.The results show that there were two oxidation mechanisms during in-flight oxidation.One was diffusion oxidation,and the other was convective oxidation.The oxidation of iron particles was mainly convective as the spraying distance was less than 50 mm.After the distance was more than 50 mm,it would be mainly diffusion oxidation.The iron particles were oxidized after the coating formed.The oxidation degree of iron particles during flight was nearly the same as that of after coating formation.
中图分类号 TG174.422
所属栏目 材料性能及其应用
基金项目 北京市教委科技发展项目(KM200610005026,JP009012200803);北京工业大学博士启动基金资助项目(52009999200701)
收稿日期 2008/7/10
修改稿日期 2009/3/18
网络出版日期
作者单位点击查看
备注张林伟(1983-),男,江西吉安人,硕士研究生.
引用该论文: ZHANG Lin-wei,WEI Qi,LI Hui,LI Zhuo-xin. Oxidation Behavior of Iron Particles during Plasma Spray[J]. Materials for mechancial engineering, 2009, 33(8): 69～72
张林伟,魏琪,李辉,栗卓新. 铁颗粒在等离子喷涂过程中的氧化行为[J]. 机械工程材料, 2009, 33(8): 69～72
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】曲敬信,汪泓宏.表面工程手册[M].北京:化学工业出版社,1997.
【2】VOLENIK K,LEITNER J,HANOUSEK F,et al.Oxides in plasma-sprayed chromium steel[J].Thermal Spray Technology,1997,6(3):327-330.
【3】ALCALA J,GAUDETT F,SURESH S,et al.Instrumented spherical micro-indentation of plasma-sprayed coatings[J].Materials Science and Engineering A,2001,316:1-10.
【4】SYED A A,DENOIRJEAN T A,FAUCHAIS P,et al.On the oxidation of stainless steel particles in the plasma jet[J].Surface and Coatings Technology,2006,200:4368-4382.
【5】CHENG K,CHEN X,WANG H X,et al.Modeling study of shrouding gas effects on a laminar argon plasma jet impinging upon a flat substrate in air surroundings[J].Thin Solid Films,2006,506/507:724-728.
【6】KOLMAN D,VOLENIK K.Modeling of oxidation during plasma spraying of iron particles[J].Plasma Chemistry and Plasma Processing,2002,22(3):437-450.
【7】DESHPANDA,SAMPATH S,ZHANG H.Mechanisms of oxidation and its role in microstructure evolution of metallic thermal spray coatings-case study for Ni-Al[J].Surface and Coatings Technology,2006,200:5395-5406.
【8】LAGNOUX O,COUDERT J F,WITTMAN K,et al.Study of air entrainment within dc plasma jet[C]//Thermal Spray:Surface Engineering via Applied Research.Las Vegas:ASM International,2000:71-77.
【2】VOLENIK K,LEITNER J,HANOUSEK F,et al.Oxides in plasma-sprayed chromium steel[J].Thermal Spray Technology,1997,6(3):327-330.
【3】ALCALA J,GAUDETT F,SURESH S,et al.Instrumented spherical micro-indentation of plasma-sprayed coatings[J].Materials Science and Engineering A,2001,316:1-10.
【4】SYED A A,DENOIRJEAN T A,FAUCHAIS P,et al.On the oxidation of stainless steel particles in the plasma jet[J].Surface and Coatings Technology,2006,200:4368-4382.
【5】CHENG K,CHEN X,WANG H X,et al.Modeling study of shrouding gas effects on a laminar argon plasma jet impinging upon a flat substrate in air surroundings[J].Thin Solid Films,2006,506/507:724-728.
【6】KOLMAN D,VOLENIK K.Modeling of oxidation during plasma spraying of iron particles[J].Plasma Chemistry and Plasma Processing,2002,22(3):437-450.
【7】DESHPANDA,SAMPATH S,ZHANG H.Mechanisms of oxidation and its role in microstructure evolution of metallic thermal spray coatings-case study for Ni-Al[J].Surface and Coatings Technology,2006,200:5395-5406.
【8】LAGNOUX O,COUDERT J F,WITTMAN K,et al.Study of air entrainment within dc plasma jet[C]//Thermal Spray:Surface Engineering via Applied Research.Las Vegas:ASM International,2000:71-77.
相关信息
