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A METHOD TO SYNTHESIXE SURFACE PORES IN METALS amp; METAL MATRIX COMPOSITES USING ENERGY BEAM
A METHOD TO SYNTHESIXE SURFACE PORES IN METALS amp; METAL MATRIX COMPOSITES USING ENERGY BEAM
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机译:利用能量束合成金属和金属基复合材料中表面孔的方法
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摘要
A porous surface is synthesized in sintered composite material using electron beams or lasers. The technique can be used for producing self lubricating bearing materials. The composite comprises 90 weight percent copper, 8 weight percent tin and 2 weight percent graphite, pressed at pressures up to 590 MPa and sintered 800 DEG C. The surface of the specimen was subjected to electron beam melting using an oscillated beam of focused electrons. Electron beam surface melting not only provide a dense substrate and a surface layer of required porosity, it also promises refined microstructural features of the surface and enhanced chemical uniformity due to rapid solidification of the melted layer.
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