最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

AgCuOIn₂O₃SnO₂ electrical contact materials with different SnO₂ contents were prepared by reaction synthesis coupled with plastic deformation process. The morphology and microstructure of the AgCuOIn₂O₃SnO₂ contact materials were characterized by scanning electron microscopy and optical microscope. The distribution uniformity of the metallographic structure and the reinforcement phase of the materials with different SnO₂ contents was analyzed. The phase structure of the materials was measured by X-ray diffraction, and the tensile strength, hardness, and resistivity of the materials were also measured. Results show that the appropriate SnO₂ addition can significantly decrease the pore size and reduce other defects in the structures. The diffusion of oxides in the silver matrix greatly improves the microstructure uniformity of AgCuOIn₂O₃ contact materials. When the SnO₂ content is fixed, the resistivity of materials is decreased with conducting the plastic deformation; with increasing the SnO₂ content, the resistivity is decreased firstly, then increased, and finally turns to be stable at 2.4 μΩ·cm. The hardness of the materials is increased significantly after SnO₂ addition. The material with 1wt% SnO₂ shows the optimal tensile strength and elongation.