| 激光熔覆TiC／FeAl复合材料涂层显微组织及初生TiC生长机制研究 |
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| 引用本文： | 陈瑶,王华明.激光熔覆TiC／FeAl复合材料涂层显微组织及初生TiC生长机制研究[J].稀有金属材料与工程,2003,32(7):569-572. |
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| 作者姓名： | 陈瑶 王华明 |
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| 作者单位： | 北京航空航天大学激光材料加工与表面工程实验室,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目(59971003) |
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| 摘 要： | 利用激光熔覆技术在1Cr18Ni9Ti奥氏体不锈钢基体上制得了以TiC为增强相、以FeAl金属间化合物为基体的快速凝固TiC／FeAl复合材料涂层，分析了该涂层的显微组织及初生TiC的生长形态和生长机制。研究结果表明，激光熔覆TiC／FeAl快速凝固复合材料涂层主要由初生TiC碳化物、初生FeAl树枝晶和枝晶间少量的FeAl／TiC共晶组成，初生TiC具有独特的径向辐射分枝小面枝晶团簇状生长形态，其生长机制为侧向生长。
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| 关 键 词： | TiC／FeAl复合材料涂层 TiC 生长机制 显微组织 |
| 文章编号： | 1002-185X(2003)07-0569-04 |
| 修稿时间： | 2002年1月14日 |
Microstructure of Laser Clad TiC/FeAl Composite Coating and Growth Mechanism of Primary TiC Carbide |
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| Chen Yao,Wang Huaming.Microstructure of Laser Clad TiC/FeAl Composite Coating and Growth Mechanism of Primary TiC Carbide[J].Rare Metal Materials and Engineering,2003,32(7):569-572. |
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| Authors: | Chen Yao Wang Huaming |
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| Abstract: | A rapidly solidified TiC/FeAl composite coating was fabricated on substrate of 1Cr18Ni9Ti stainless steel by laser cladding. The microstructure of composite coating, the growth morphology and growth mechanism of primary TiC carbide were investigated. Results show that the laser clad coating has a microstructure consisting of primary TiC,primary dendritic FeAl and small amount of interdendritic FeAl/TiC eutectic. The primary TiC carbide has an unique growth morphology of radial branching faceted dendritic colony, and its growth mechanism is still lateral growth. |
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| Keywords: | TiC/FeAl composite coating TiC growth mechanism microstructure |
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