OALib Journal期刊
ISSN: 2333-9721
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Pd-Ni-(Cr,V)基高温钎料对Si3N4陶瓷的润湿及界面反应
, PP. 1260-1264
Keywords: Si3N4,反应层,润湿性
Abstract:
采用座滴法研究了4种钎料Pd60-Ni40,PdNi-(3-6)V,PdNi-(7-15)V和PdNi-(16-24)Cr-(6-15)V(质量分数,%)在Si3N4陶瓷上的润湿性.结果表明,在1250℃/30min的真空加热条件下,4种钎料均在Si3N4母材上润湿铺展,PdNi-(16-24)Cr-(6-15)V钎料不但润湿角小,而且形成了无缺陷的润湿界面.该钎料与Si3N4形成的扩散反应层中,Cr和V优先与从母材扩散出的N反应生成相应的Cr-N和V-N相;只有少量的Si参与反应生成相应的Cr-Si和V-Si相;钎料基体区中主要是溶有少量Si的Pd-Ni固溶体以及Pd-Si和Ni-Si相.Cr相对于V更容易向界面扩散.
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