一种制备高致密度超细晶稀土氧化物掺杂 钨合金的方法，属于粉末冶金领域。制备方法为： 以偏钨酸铵、稀土硝酸盐、燃料、硝酸铵为原料， 采用低温溶液燃烧合成法制备氧化物复合粉末 前驱体，然后使用H2还原制得纳米稀土氧化物掺 杂钨合金粉末；采用多步放电等离子烧结制备高 致密度超细晶稀土氧化物掺杂钨合金。本发明采 用的低温溶液燃烧合成法可达到分子级别的混 合，得到的前驱体中氧化钨、稀土氧化物均匀混 合，还原产物为合金粉末，无需后续特殊处理； SPS适用于难熔金属及难烧结材料的快速烧结， 采用多步SPS可获得高致密度超细晶稀土氧化物 掺杂钨合金，相对致密度可达96％～99％，平均 晶粒尺寸≤300nm。本方法的原料简单易得，设备 简单，工艺快捷，适合进行大规模生产。

A method for preparing high-density ultra-fine crystalline rare earth oxide doped tungsten alloy, belongs to the field of powder metallurgy. The preparation method is as follows. using ammonium metatungstate, rare-earth nitrate, fuel, and ammonium nitrate as raw materials. The oxide composite powder is prepared by low-temperature solution combustion synthesis method The precursors were then reduced with H₂ to produce nano-rare earth oxide doped tungsten alloy powder. nano rare-earth oxide doped tungsten alloy powder by H₂ reduction; multi-step discharge plasma sintering was used to prepare high The high density ultra-fine crystalline rare earth oxide doped tungsten alloy was prepared by multi-step discharge plasma sintering. The low-temperature solution combustion synthesis method used in the present invention can The low-temperature solution combustion synthesis method used in this invention can achieve molecular-level mixing. The tungsten oxide and rare-earth oxide are uniformly mixed in the precursor. The reduction product is an alloy powder, and no special treatment is required. SPS is suitable for the rapid sintering of refractory metals and difficult to sinter materials. SPS is suitable for the rapid sintering of refractory metals and difficult-to-sinter materials, and can be used to obtain high-density ultra-fine crystalline rare-earth oxide SPS is suitable for fast sintering of refractory metals and hard-to-sinter materials. The raw materials of this method are simple and easy to obtain, the equipment is simple and the process is fast. This method is suitable for mass production because of the simple raw materials, simple equipment and fast process.