(昆明貴金屬研究所， 昆明 650221)
摘 要: 利用ASTM觸頭材料模擬試驗(yàn)機(jī)、高溫質(zhì)量損失、攝譜儀、SEM和WDS等研究了釕對鉑合金接點(diǎn)材料的抗熔焊性能的影響。由于Ru易氧化生成比IrO2更穩(wěn)定的RuO2，RuO2的分解比IrO2需要更多的分解熱，因此，接點(diǎn)的溫度升高受到限制。RuO2增加了金屬熔化液的粘度，減少了因電弧引起的接點(diǎn)腐蝕。此外，選擇性的金屬轉(zhuǎn)移有利于提高Pt-10Ru-2Ir合金接點(diǎn)的抗熔焊性能。
關(guān)鍵字: 釕； 鉑合金接點(diǎn)材料； 抗熔焊
platinum alloys contact materials
（Institute of Precious Metals, Kunming 650221, P.R.China）
Abstract:By means of simulated test machine of ASTM contact materials, mass loss at high temperature, spectrogragh, SEM and WDS, the effect of ruthenium on resistance to weld of platinum alloys contact materials was studied. The experimental results show that ruthenium increases the resistance to weld of platinum contact materials. Ruthenium is easily oxidized and produces RuO2 which is stabler than IrO2, the dissolution of RuO2 need more heat than IrO2, therefore, the temperature of contact was limited. Besides, RuO2 increases the viscosity of metal melt,the erosion of contact caused by arc is reduced. In addition, the selection transfer of metals is beneficial to enhancing resistance to weld of Pt-10Ru-2Ir alloy contact.
Key words: ruthenium; platinum alloy contact; resistance to weld
