引用本文:潘继岗,樊自拴,孙冬柏,俞宏英,李辉勤,孟惠民,王旭东.超音速火焰喷涂制备钼基非晶纳米晶涂层的研究[J].中国表面工程,2004,(6):22~26
.Research on Molybdenum-base Amorphous and Nanocrystalline Alloy Coatings by High Velocity Oxy-fuel Spraying[J].China Surface Engineering,2004,(6):22~26
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超音速火焰喷涂制备钼基非晶纳米晶涂层的研究
潘继岗,樊自拴,孙冬柏,俞宏英,李辉勤,孟惠民,王旭东
作者单位
摘要:
利用超音速火焰喷涂(HVOF)技术，在0Cr13Ni5Mo不锈钢基体上成功的制备出了一种Mo基非晶纳米晶复合涂层。这种涂层组织均匀致密，孔隙率小，约为3．4％，呈典型的层状分布；涂层是由非晶和纳米晶组成，在非晶基体中均匀分布了纳米晶粒。根据衍射峰的半高宽，计算出Mo基涂层中的晶粒平均尺寸为25～70nm，与通过透射电镜的观察得到晶粒大小数20～70nm相符；涂层具有较高的硬度，平均显微硬度为859．0HV50；所获得的非晶纳米晶涂层具有较高的热稳定性，在1020．1℃以下使用，不会发生晶型转变。
关键词:  Mo基涂层 非晶纳米晶复合涂层 显微硬度 孔隙率 超音速火焰喷涂
DOI：
分类号:TG174.442
基金项目:国家863计划(2002AA331080);北京市重大科技项目(H020420050021)子项目.
Research on Molybdenum-base Amorphous and Nanocrystalline Alloy Coatings by High Velocity Oxy-fuel Spraying
PAN Ji-gang  FAN Zi-shuan  SUN Dong-bai  YU Hong-ying  LI Hui-qin  MENG Hui-min  WANG Xu-dong
Abstract:
In this paper,an amorphous nanocrystalline alloy coatings was prepared on 0Cr13Ni5Mo stainless steel substrate by high velocity oxy-fuel (HVOF) thermal spraying. The coatings showed homogenous laminated microstructure and contained only a little micro-pores. The porosity was only 3.4 %. The structure of coatings was composed of amorphous phase and uniformly distributed nanocrystals. According to half-high width of diffraction patterns, the average particle size of molybdenum- based alloy coatings was about 25~70 nm, which was similar to that observed under TEM. The coating showed high hardness, the average micro-hardness reached 1065.0HV50. Furthermore, the amorphous nanocrystalline alloy coatings exhibited high thermal stability, not crystallized at temperatures under 1 020.1 .
Key words:  molybdenum- based coatings,amorphous nanocrystalline alloy coatings,micro-hardness,porosity,HVOF
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