等离子喷涂成型钨基材料及薄壁构件研究

Refractory metal tungsten by process of plasma spraying

对小型固体火箭发动机喷管喉衬内衬用零烧蚀材料进行研究。采用大气等离子喷涂工艺成型难熔金属钨基薄壁构件,并进行材料性能表征。结果表明,等离子喷涂工艺成型钨材料经烧结、渗铜处理后,致密化程度提高,力学性能提升,压缩强度达750 MPa以上,通过试验条件为温度3 000～3 500 K、工作时间6.4 s、平均压强3.2 MPa的小型试验发动机热试车考核,材料烧蚀率为零。喷涂钨/烧结/渗铜材料可作为3 000 K条件下零烧蚀材料的候选。

A non-eroding material for a small SRM nozzle insert was studied.The components of thin shell of refractory metal tungsten were shaped by means of air plasma spray process.Performance of materials was characterized.The results show that,after sintering and being copper-impregnated,the material has a higher density and higher mechanical properties,the compressive strength attains 750 MPa.The insert of the material is successfully hot fire tested with zero erosion for 6.4 s at 3 000~3 500 K under 3.2 MPa.So the material could be used as the non-eroding material under the condition of 3 000 K.