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| Study on effect of powder particle size on mechanical properties of molybdenum
shield |
| GONG Yanfei1，QU Binrui2，LIANG Yanming2，WANG Chengyang1，
DONG Di1，SUN Xiaoxia3 |
| 1Advanced Technology and Materials Co.，Ltd.，Beijing 100081，China；2China Academy of Launch
Vehicle Technology，Beijing 100076，China；3China University of Labor Relations，Beijing 100048，China |
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Abstract In this paper，the molybdenum shield made of different sizes of molybdenum powder was tested in 60 s
solid rocket ground motor test. The correlation between the powder size and the mechanical properties of molybdenum
shield was obtained through the metallographic structure，mechanical property test and fracture structure analysis
of ablation results. The results show that with the increase of the particle size of the original powder，the ablation
resistance and the mechanical properties of the Mo guard plate used in the SRM with 60 s working time are improved.
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Received: 10 June 2020
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2021, Vol. 31 
