Titanium metallization of alumina ceramics by molten salt reaction
Titanium metallization of alumina ceramics by molten salt reaction
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DOI：
10.1016/j.apsusc.2008.01.077
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发表时间：
2008-05
影响因子：
6.7
通讯作者：
Jianqiang Li;W. Pan;Zhangfu Yuan;Yunfa Chen
中科院分区：
文献类型：
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作者：
Jianqiang Li;W. Pan;Zhangfu Yuan;Yunfa Chen
在这项工作中，我们报道了一种新的方法，是灵活的金属化氧化铝陶瓷具有复杂的表面。在NaCl-KCl-K2 TiF 6熔盐体系中，通过Ti 2+离子的析出，在Al 2 O3陶瓷表面沉积了致密的Ti层，并具有很强的结合力。研究了反应温度、反应时间和K2 TiF 6初始浓度对沉积速率的影响。所制备的涂层由双层结构的活性Ti 2 O相组成，即外层为粗颗粒，内层为细颗粒。用座滴法测定了共晶Ag 72 Cu 28和Pb 37 Sn 63合金与金属化Al 2 O3陶瓷的润湿性，并与原始陶瓷的润湿性进行了比较。结果表明，Ag_（72）Cu_（28）和Pb_（37）Sn_（63）合金对金属化Al_2O_3表面有较好的润湿作用。当温度升高到900°C时，接触角分别降低到35°和8°，表明熔盐反应金属化后的润湿性显著增强。
In this work, we reported a novel method that is flexible to metallize alumina ceramics with complex surface. Through Ti2+disproportionation occurred in molten NaCl–KCl–K2TiF6bath, the dense Ti layer was deposited on Al2O3ceramics surface with strong adhesion. The effects of reaction temperature, time and initial K2TiF6concentration on deposition rate were investigated. As-prepared coatings compose of bilayer structure of reactive Ti2O phase, namely, the outer layer with coarse grains and the inner layer with fine grains. The wettability of eutectic Ag72Cu28 and Pb37Sn63 alloys with metallized Al2O3ceramics was measured by using sessile drop method and compared with that of original ceramics. The results show that the metallized Al2O3surface could be reactively wetted well with Ag72Cu28 and Pb37Sn63 alloys. The contact angles lowered to 35° and 8°, respectively, when temperature rose to 900°C, showing significant enhancement of wettability after Ti metallization by molten salt reaction.