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以仲钼酸铵(NH_4)_6Mo_7O_(24)·4H_2O、硝酸铜Cu(NO_3)_2·3H_2O、甘氨酸和乙二胺为原料采用甘氨酸硝酸盐(GNP)法制备前驱体粉末,再经过700℃氢气还原得到Mo-20Cu复合粉末,经压制后在1150℃于不同压力下进行热压烧结,研究不同压力对钼铜合金烧结体性能的影响。结果表明:GNP-H_2还原法可以制备出平均晶粒尺寸为70~80 nm且大小均匀、分散性优异的球形Mo-Cu纳米复合粉末,经加压烧结致密度达到99.7%,各相组织分布均匀,且在一定的范围内压力增大可以使烧结体硬度、电导率和热导率有所增大。
The precursor powder was prepared by the method of glycine nitrate (GNP) using ammonium paramolybdate (NH_4) _6Mo_7O_ (24) · 4H_2O, Cu (NO_3) _2 · 3H_2O, glycine and ethylenediamine as starting materials, Mo-20Cu composite powder was obtained by reduction, and then pressed at 1150 ℃ under different pressure for hot-pressing sintering to study the effect of different pressure on the properties of sintered molybdenum-copper alloy. The results show that the GNP-H 2 reduction method can prepare spherical Mo-Cu nanocomposite powders with an average grain size of 70-80 nm, uniform size and excellent dispersibility. The density of the sintered Mo-Cu nanocomposite powder is 99.7% Uniform, and in a certain range of pressure can make the sintered body hardness, conductivity and thermal conductivity increased.