【摘要】 采用高能球磨方法制备AgSnO₂复合粉末,将球磨粉末冷喷涂到铜基板上,能够获得几毫米厚度的较致密的AgSnO₂触点涂层。850℃退火后涂层发生进一步致密化并且在原始粉末颗粒边界形成富银区,涂层材料硬度略为降低。电弧侵蚀和电接触试验表明,冷喷涂的AgSnO₂涂层材料具有低而稳定的接触电阻,能够满足触点的基本性能要求。更多还原

【Abstract】 Cold spray was used to prepare the AgSnO₂ coating on copper substrates with high energy ball milled AgSnO₂ composite powders.After annealing at 850°C,the density increases,the Ag-rich phase migrates toward the boundaries of original composite powders and the hardness decreases for the cold sprayed coatings.The arcing and electrical contact experiments show that there is low and stable contact resistance for the AgSnO₂ coating,which can be used in the low voltage apparatus.更多还原