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测量了直径20—300微米的大量的Fe鬚、Fe-Cu鬚、Fe-Co鬚、Cu鬚和Cu-Co鬚的室温和高温拉断强度,结果指出,弥散型的二元金属鬚如Fe-Cu鬚和Cu-Co鬚的强度较高于单元金属鬚,而固溶型的二元金属鬚如Fe-Co鬚则否。根据应力应变曲线的测量和金相观测的结果,认为弥散型的Fe-Cu鬚的强度所以较高,可能是由于高强度的铁铜弥散混合层的出现,而它的范性所以较好,可能是由于这种鬚具有范性较好的铜心轴。 讨论了弥散型和固溶型二元金属鬚在变粗当中所包含的基本过程,以及与它们所表现的强度和形变特点的联系。并且指出,生长弥散型混合鬚的原理和方法给制备强度较高和范性较好的复合材料提供了一个值得参考的途径。
The room temperature and high temperature tensile strength of a large amount of Fe whiskers, Fe-Cu whiskers, Fe-Co whiskers, Cu whiskers and Cu-Co whiskers having a diameter of 20-300 micrometers were measured and found that diffusive binary metal whiskers such as Fe The Cu-Co and Cu-Co whiskers have a higher strength than the unit metal whiskers, while the solid solution-type binary metals such as Fe-Co whiskers are not. According to the measurement of stress-strain curve and the result of metallographic observation, it is considered that the strength of dispersive Fe-Cu whiskers is higher, probably due to the appearance of high-strength Fe-Cu dispersion mixed layer, It may be due to this need to have a better model of the copper mandrel. The basic processes involved in the coarsening of binary and diffusive binary metal whiskers are discussed, together with their relationship to the strength and deformability they exhibit. It is also pointed out that the principle and method of growing dispersive whiskers provide a valuable reference for the preparation of composites with higher strength and better properties.