C/ Ti 原子比对反应火焰喷涂TiC/ Fe 复合涂层组织结构和硬度的影响

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基金项目: 河南杰出人才创新基金资助项目(0421001000)

INFLUENCE OF C/ Ti ATOMIC RATIO ON MICROSTRUCTURE AND HARDNESSOF TiC/ Fe COMPOSITE COATING BY REACTIVE FLAME SPRAY

1.
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2.
National Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China

摘要: 以TiFe 粉和碳的前驱体(石油沥青) 为原料, 用前驱体碳化复合技术制备了Ti-Fe-C 反应喷涂复合粉末, 并采用普通火焰喷涂技术成功制备了TiC/ Fe 陶瓷金属复合涂层。研究了不同C/ Ti 原子比对反应火焰喷涂TiC/ Fe 复合涂层相组成、显微结构和硬度的影响。结果表明, 前驱体碳化复合技术制备的Ti-Fe-C 系反应喷涂复合粉末中C/ Ti 原子比是影响涂层相组成、显微结构和硬度的关键因素。C/ Ti 原子比不同, 涂层的相组成和硬度不同; 随着C/ Ti 原子比增大, 涂层中TiC 团聚富集区增大, 涂层的孔隙率也随之增大。
- 反应火焰喷涂 /
- TiC/ Fe 复合涂层 /
- 前驱体 /
- C/ Ti 原子比
Abstract: Ti-Fe-C composite powders for Reactive Flame Spray (RFS) were prepared by precursor carbonizationcomposition process using ferrotitanium and asphalt as raw materials. TiC/ Fe composite coatings were synthesizedand deposited by RFS. The influence of C/ Ti atomic ratio on the component, microst ructure and hardness of thecomposite coatings was investigated. The result s show that C/ Ti atomic ratio has st rong influence on the component, microst ructure and hardness of TiC/ Fe composite coating. The TiC aggregate size and porosity of TiC/ Fecomposite coating increase with the increase of the C/ Ti atomic ratio.
- reactive flame spray /
- TiC/ Fe composite coating /
- precursor /
- C/ Ti atomic ratio