等离子喷涂法纳米结构WC-12Co涂层的微结构与形成机理的研究

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材料工程 ›› 2006, Vol. 0 ›› Issue (6) : 40-45.

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表面工程

等离子喷涂法纳米结构WC-12Co涂层的微结构与形成机理的研究

李博宇¹, 董星龙¹, 刘圆圆¹, 杨明川², 刘方军³

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Microstructure and Formation Mechanism of Nanostructured WC-12Co Coatings Deposited by Plasma Flame Spray

LI Bo-yu¹, DONG Xing-long¹, LIU Yuan-yuan¹, YANG Ming-chuan², LIU Fang-jun³

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摘要

使用独特的雾化干燥结合固定床技术合成WC-12Co纳米复合粉体,利用等离子喷涂法制备纳米结构WC-12Co涂层,通过X射线衍射、扫描电镜、透射电镜等分析手段对等离子喷涂纳米结构WC-12Co涂层进行显微结构分析。结果表明涂层中除了WC相,不仅有W₂C,W等非WC/Co相的产生,还出现了Co_XW_yC_z(Co₃W₉C₄,Co₃W₃C),Co₃C等相及非晶和孪晶组织,在此基础上本工作将对等离子喷涂纳米结构WC-12Co涂层的形成机理作初步的研究与讨论。

Abstract

The precursor of WC-12Co nano-composite powder is synthesized by the larruping method of spray drying and fixed bed technique,nanostructured WC-12Co cermet coatings are deposited by plasma flame spray.Microstructure of nanostructured WC-12Co cermet coatings is evaluated by using X-ray diffraction(XRD),scanning electron microscopy(SEM) and transmission electron microscopy(TEM).The nano-composite WC-12Co powders generally contain WC and Co,whereas the phases W₂C,W and Co₃C,Co₃W₉C₄,Co₃W₃C/amorphous binder phases based on Co and nano-twins occur in coatings,the mechanism of formation of nanostructured WC-12Co cermet coatings is discussed on the basis of the microstructure in this paper.

导出引用

李博宇, 董星龙, 刘圆圆, 杨明川, 刘方军. 等离子喷涂法纳米结构WC-12Co涂层的微结构与形成机理的研究[J]. 材料工程, 2006, 0(6): 40-45

LI Bo-yu, DONG Xing-long, LIU Yuan-yuan, YANG Ming-chuan, LIU Fang-jun. Microstructure and Formation Mechanism of Nanostructured WC-12Co Coatings Deposited by Plasma Flame Spray[J]. Journal of Materials Engineering, 2006, 0(6): 40-45

中图分类号： TG174.442

参考文献

[1] LIAO H,NORMAND B,CODDET C.Influence of coating microstructure on the abrasive wear resistance of WC/Co cermet coatings[J].Surface and Coatings Technology,2000,124(2-3):235-242.
[2] ALLEN C,SHEEN M,WILLIAMS J,et al.The wear of ultrafine WC-Co hard metals[J].Wear,2001,250(1-12):604-610.
[3] FANG Zhi-gang,EASON JIMMY W.Study of nanostructured WC-Co composites[J].Int J of Refractory Metals & Hard Materials,1995,13(5):297-303.
[4] WANG Ying-long,STEPHEN M H,JOHES P.Evaluation of thermally-sprayed ceremaic coatings using a noval ball-on-inclined plane stratch method[J].Wear,1998,218(1):96-102.
[5] STEWART D A,SHIPWAY P H,MCCARTN E Y D G.Abrasive wear behaviour of conventional and nanocomposite HVOF-sprayed WC-Co coatings[J].Wear,1999,225(2):789-798.
[6] 徐滨士,欧忠文,马世宁.纳米表面工程基本问题及其进展[J].中国表面工程,2001,(3):6-12.
[7] HE Jian-hong,SCHOENUNG J M.A review on nanostructured WC-Co coatings[J].Surface and Coatings Technology 2002,157(1):72-79.
[8] KEAR B K,MCCANDLISH L E.Chemical processing and properties of nanostructured WC-Co materials[J].Nanostructured Mater,1993,3(1):19.
[9] EI-ESKANDARAN Y M SHERIF,MAHDAY AMIR A,AHMED H A,et al.Synthesis and characterazions of ballmilled nanocrystallione WC and nanocomposite WC-Co powders and subsequent consolididations[J].Journal of Alloys and Compounds,2000,312(1-2):315-325.
[10] HE Jian-hong,SCHOENUNG J M.Review:nanostrucured coatings[J].Materials and Engineering A,2002,336 (1-2):274-319.
[11] 邓世均.高性能陶瓷涂层[M].北京:化学工业出版社,2004.
[12] STEWART D A,SHIPWAY P H,MCCARTNEY D G.Microstructural evolution in thermally sprayed WC-Co coatings:comparision between nanocomposite and conventional starting powders[J].Acta Mater,2000,48 (7):1593-1604.
[13] 徐滨士,朱绍华.表面工程的理论与技术[M].北京:国防工业出版社,1999.
[14] B B库吉诺夫著.等离子涂层[M].北京:科学出版社,1981.