为研究Ag Cd合金的加工工艺对内氧化后的Ag Cd O触点材料组织的影响,改善高Cd含量的Ag Cd O触点材料的组织和性能,本文采用两种不同的工艺制备了Ag Cd O(17)触点材料。结果表明,新工艺制备的Ag Cd O触点较常规工艺具有组织均匀、复银界...为研究Ag Cd合金的加工工艺对内氧化后的Ag Cd O触点材料组织的影响,改善高Cd含量的Ag Cd O触点材料的组织和性能,本文采用两种不同的工艺制备了Ag Cd O(17)触点材料。结果表明,新工艺制备的Ag Cd O触点较常规工艺具有组织均匀、复银界面良好的特点。这两种工艺加工触点材料组织变化源于其加工原理和组织形成机理存在着差异:常规工艺热轧发生动态再结晶,组织均匀细小,易冷轧细化和内氧化粗化;新工艺组织由大量粗大的退火孪晶组成,不易冷轧细化,内氧化过程中长大也缓慢。此外,新工艺中的退火处理分散了内氧化前与氧逆扩散富集于复银界面处的Cd原子,从而使Ag Cd O触点获得了良好的复银界面。展开更多
分析了纯Ag、细晶Ag、AgCe(0.5)、AgNi(10)、AgCdO(12)、AgSnO2(10)、AgSnO2(12)等常用低压触点材料的组织结构及电弧侵蚀特点,采用ZWP-1型触点电性能模拟试验机于20 A/250 V AC、阻性负载条件下对上述触点材料的电寿命和磨损量进行了...分析了纯Ag、细晶Ag、AgCe(0.5)、AgNi(10)、AgCdO(12)、AgSnO2(10)、AgSnO2(12)等常用低压触点材料的组织结构及电弧侵蚀特点,采用ZWP-1型触点电性能模拟试验机于20 A/250 V AC、阻性负载条件下对上述触点材料的电寿命和磨损量进行了对比试验,对试验结果进行了分析和讨论。展开更多
The arc erosion experiments on five kinds of silver-based contact materials, AgZnO (10), AgSnO2 (8.5) In2O3 (4), AgCdO (12), AgNi(10), AgWC(12)C(3) were carried out according to different breaking times, breaking curr...The arc erosion experiments on five kinds of silver-based contact materials, AgZnO (10), AgSnO2 (8.5) In2O3 (4), AgCdO (12), AgNi(10), AgWC(12)C(3) were carried out according to different breaking times, breaking currents, and making pressures. Then based on the theoretical analysis and the photographs taken by scanning electronic mi-croscope with EDAX analyzer, the crack morphology was studied scientifically. Three types of cracks, which are cavity cracks, grain boundaries (or phase boundaries) slipping cracks, and thermal stress cracks, were put forward under arc and making pressure through establishing their physical models and discussing their formation mechanisms.展开更多
文摘为研究Ag Cd合金的加工工艺对内氧化后的Ag Cd O触点材料组织的影响,改善高Cd含量的Ag Cd O触点材料的组织和性能,本文采用两种不同的工艺制备了Ag Cd O(17)触点材料。结果表明,新工艺制备的Ag Cd O触点较常规工艺具有组织均匀、复银界面良好的特点。这两种工艺加工触点材料组织变化源于其加工原理和组织形成机理存在着差异:常规工艺热轧发生动态再结晶,组织均匀细小,易冷轧细化和内氧化粗化;新工艺组织由大量粗大的退火孪晶组成,不易冷轧细化,内氧化过程中长大也缓慢。此外,新工艺中的退火处理分散了内氧化前与氧逆扩散富集于复银界面处的Cd原子,从而使Ag Cd O触点获得了良好的复银界面。
文摘分析了纯Ag、细晶Ag、AgCe(0.5)、AgNi(10)、AgCdO(12)、AgSnO2(10)、AgSnO2(12)等常用低压触点材料的组织结构及电弧侵蚀特点,采用ZWP-1型触点电性能模拟试验机于20 A/250 V AC、阻性负载条件下对上述触点材料的电寿命和磨损量进行了对比试验,对试验结果进行了分析和讨论。
基金Supported by Fok Yintung Education Foundation of China(71056)
文摘The arc erosion experiments on five kinds of silver-based contact materials, AgZnO (10), AgSnO2 (8.5) In2O3 (4), AgCdO (12), AgNi(10), AgWC(12)C(3) were carried out according to different breaking times, breaking currents, and making pressures. Then based on the theoretical analysis and the photographs taken by scanning electronic mi-croscope with EDAX analyzer, the crack morphology was studied scientifically. Three types of cracks, which are cavity cracks, grain boundaries (or phase boundaries) slipping cracks, and thermal stress cracks, were put forward under arc and making pressure through establishing their physical models and discussing their formation mechanisms.
