摘要
以钛铁粉、羰基镍粉和碳的前驱体(蔗糖)为原料,通过前驱体碳化复合技术制备Ti-Fe-Ni-C系反应热喷涂粉末,并通过爆炸喷涂技术原位合成并沉积TiC/Fe-Ni金属陶瓷复合涂层;利用XRD、SEM和EDS研究喷涂复合粉末和涂层的相组成、显微结构。结果表明:采用前驱体碳化复合技术制备的Ti-Fe-Ni-C反应喷涂复合粉末粒度均匀;所制备的TiC/Fe-Ni复合涂层由不同含量TiC颗粒分布于金属基体内部而形成的复合片层叠加而成,基体主要是(Fe,Ni)固溶体;TiC颗粒大致呈球形,粒度为纳米级;复合涂层的平均显微硬度HV0.2为18.9GPa。
TiC/Fe-Ni composite coatings are synthesized and deposited by reactive detonation spray （RDS） with a kind of Ti-Fe-Ni-C composite powder prepared by precursor carbonization-composition process using ferrotitanium, carbonyl nickel powder and saccharose as raw materials. XRD, SEM and EDS are employed to analyze the composition and microstructure of the composite powder and coatings. The influence of microstructure on the microhardness of composite coatings is investigated. The results show that the powder is uniform in particle size without any impurity. The TiC/Fe-Ni composite coatings are composed of layers in which the round TiC particles are dispersed within Fe-Ni solid solution alloy matrix. The TiC particles are fundamentally globular, and their grain size is in the scale of nanometer. The average microhardness HV0.2 of the composite coatings is 18.90 GPa.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第7期1313-1316,共4页
Rare Metal Materials and Engineering
基金
焊接国家重点实验室开放资助项目
河南杰出人才创新基金资助项目(0421001000)
