熔融盐法合成Cr_2AlC陶瓷粉体的工艺研究

Molten salt method to synthesize Cr_2AlC ceramic powder

采用正交实验法,研究了在碳热还原气氛保护下的熔融盐中合成Cr2AlC陶瓷粉体工艺中的助溶剂用量、合成温度、原料配比及保温时间对Cr2AlC相对产出率的影响,优化了合成工艺参数,对优化的工艺参数进行了实验验证,并与在氩气气氛和大气气氛合成的粉体相比较。结果表明:实验中影响Cr2AlC产出率的最主要因素是合成温度,其次是助溶剂用量和保温时间,原料配比是最弱因素;碳热还原气氛与氩气具有相同的防止原料氧化的保护作用。

The Cr2A1C ceramic powder was synthesized by using the molten salt method in carbothermal reduction atmosphere. The orthogonal experiments were designed to investigate the effects of cosolvent dosage, synthesis temperature, raw material ratio and holding time on the productivity of Cr2A1C powder. The optimal synthesis pa- rameters were achieved and then be verified. The results show that synthesis temperature is the most principal fac- tor, then is the cosolvent dosage and holding time, raw material ratio is the last one. The carbothermal reduction at- mosphere has the same function of preventing raw material from oxidization with argon atmosphere.