| 活性粉末Ni-Al与SiC陶瓷的界面润湿特性和润湿机理研究 |
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| 引用本文： | 张利,李树杰,张坤.活性粉末Ni-Al与SiC陶瓷的界面润湿特性和润湿机理研究[J].粉末冶金技术,2006,24(3):163-165. |
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| 作者姓名： | 张利 李树杰 张坤 |
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| 作者单位： | 1. 华北科技学院建筑工程系,北京东燕郊,101601
2. 北京航空航天大学材料科学与工程学院,北京,100083 |
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| 基金项目： | 中国航空科学基金;国家自然科学基金 |
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| 摘 要： | 采用座滴法研究了不同Al含量、不同温度和保温时间对Ni-Al/SiC体系界面润湿性的影响,通过SEM、XRD分析了Ni-Al/SiC体系的润湿机理.结果表明,Ni-Al系焊料与SiC陶瓷的润湿过程属化学润湿,在本研究的试验范围之内,随着Al含量增加、温度升高、保温时间延长,润湿角下降.由于界面反应产物Al4C3的生成导致的扩散层体积增大是Ni-Al/SiC体系润湿性得到改善的关键.
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| 关 键 词： | 化学润湿 接触角 动力学 |
| 收稿时间： | 2005-05-17 |
| 修稿时间： | 2005年5月17日 |
Study on the wettability and mechanism between Ni-Al powders and SiC ceramics |
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| Zhang Li,Li Shujie,Zhang Kun.Study on the wettability and mechanism between Ni-Al powders and SiC ceramics[J].Powder Metallurgy Technology,2006,24(3):163-165. |
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| Authors: | Zhang Li Li Shujie Zhang Kun |
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| Abstract: | By using the sessile drop method , the wettability behavior between Ni-Al powders and SiC ceramics was studied. The mechanism of reactive wetting of metal/ceramics was investigated on the basis of SEM and XRD. The results show that the final contact angle decreases with increasing of the Al content. Also, the contact angle decreases with increasing of the temperature and prolonging of the dwelling time respectively. The types of the resultants at the interface depend on the composition of the original metallic powders and the technological parameters of the test. Al4C3, which causes the interracial reaction layer expanding, is the predominant contribution to the wetting. |
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| Keywords: | chemical wettability contact angle wetting dynamics |
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