Soft Soldering of Carbon Materials after Metalizing

高密度石墨、玻璃炭复合材料、树脂烧结石墨等炭素材料将成为聚合物电解液燃料电池隔膜材料。但是，这些材料的粘结性能很差。对碳材料表面铜-银-钛金属化后的软钎焊进行了研究。主要研究结果如下：(1)在高密度石墨和树脂烧结石墨条件下，获得了无孔洞连接。(2)在上述两种石墨上获得的接头强度(四点弯曲强度)与基体石墨的弯曲强度相当。

Carbon materials such as high density graphite, glassy carbon composite, resin sintered graphite are going to apply for separater of Polymer Electrolyte Fuel Cell. But, bonding properties of these materials is very poor. Soft soldering (Sn-Pb) after Cu-Ag-Ti metalizing on carbon materials was studied in this research. Main results obtained are as follows.(1) Void free bonding joint is obtained at high density graphite and resin sintered graphite. But, Cu-Ag-Ti metalizing layer was peeled off at glassy carbon composite.(2) Joint strength (4 point bending strength) equivalent to bending strength of base graphite is obtained at above mentioned two graphites.