【摘要】 采用座滴法研究了 Ｎｉ－Ｆｅ－Ｃｒ－（１４－２９）Ｔｉ（质量分数，％，下同）合金在 Ｓｉ_３Ｎ_４陶瓷上的润湿行为．结果表明，在１４９３ Ｋ， １０ ｍｉｎ的真空加热条件下，随着含 Ｔｉ量的增加，合金的润湿性逐渐改善，含 Ｔｉ量为 ２４％－２９％时合金的润湿角达到２７．３°．微观分析表明，钎料中的元素 Ｃｒ向 Ｎｉ－Ｆｅ－Ｃｒ－（２４－２９）Ｔｉ／ Ｓｉ_３Ｎ_４界面区扩散和富集，生成了复杂的 Ｃｒ－Ｎｉ－Ｆｅ－Ｓｉ四元化合标分析了 Ｔｉ元素含量的增加对于合金润湿性改善的原因合金中加入元素 Ｃｏ并降低 Ｎｉ含量可增强 Ｔｉ， Ｃｒ的活性，导致形成不同的界面反应产物并对合金润湿能力及界面结合能力产生重要影响成分调整后的 Ｃｏ－Ｎｉ－Ｆｅ－Ｃｒ－（１４－２０）Ｔｉ合金对Ｓｉ_３Ｎ_４的润湿角可达到２０．０°，形成牢固的润湿界面．更多还原

【Abstract】 The wetting behavior of Ni-Fe-Cr-（14-29）Ti （mass fraction, %） alloys on Si₃N₄ was studied by the sessile drop method. The results show that on the condition heating at 1493 K for 10 min in vacuum, the alloy’s wettability on Si₃N₄ is improved by increasing the Ti content. When the Ti content is high up to 24%-29 %, the corresponding wetting angle reaches 27.3°. The element Cr accumulated at the interface of Ni-Fe-Cr-（24-29）Ti alloy/Si₃N₄ and a complex quarternary compound of Cr-Ni-Fe-Si formed. The reasons of the improvement of wettability by Ti addition were analysed. The activities of the elements Ti and Cr can be increased by replacing Ni with Co in the Ni-Fe-Cr-Ti alloys. The composition change resulted in different transition structures composed of layered interfacial reaction products, which have remarkable effects on the wettability and the interfacial bonding. After the composition adjustment, the wetting angle of the Co-Ni-Fe-Cr- （14-20） Ti alloy on the Si₃N₄ reached 20.0°, and the strong bonding between the Si₃N₄ and the brazing filler was obtained.更多还原