喷雾共沉积颗粒增强锌基复合材料的高频内耗

基金项目:

国家自然科学基金基金（59671026）中科院内耗与超声衰减开放实验室开放基金（B96003）资助项目

HIGH-FREQUENCY INTERNAL FRICTION BEHAVIOR OF PARTICLE REINFORCED MMCs PREPARED BY SPRAY CO-DEPOSITION

State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xian 710072

摘要: 采用喷雾共沉积技术在ZA27合金中添加50mg．g^-1Si制备了体积分数为10％的石墨、SiC增强锌基复合材料。用声频内耗仪对挤压前后材料的高频内耗行为进行了测量。结果发现，30℃时石墨、SiC增强复合材料的阻尼能力较常规铸造ZA27合金分别提高2．90和2.38倍；挤压后两种复合材料内耗值相当接近（约为常规铸造ZA27合金的4．3倍）。在微观组织形貌分析基础上探讨了石墨、SiC颗粒对复合材料内耗机制的影响。
- 喷雾共沉积 /
- 锌基合金 /
- 复合材料 /
- 高频内耗
Abstract: The effects of graphite and SiC particles on the resultant damping behavior of the spray deposited high silicon alloy ZA27 were examined by Sound frequecy internal friction apparatus. The experimental results show that the damping capacities of the MMCs reinforced by SiC and Gr particulates are 3.90 and 3. 381 times more respectively than tha of the ascast alloy ZA27 at 30℃. After extrusion, the damping capacities of the MMCs improve a tittle, but the difference between them decreased a lot. The operative damping mechanisms were discussed in ligh of the data obtained from characterization of microstructure.
- Spray co-deposition /
- Zn-based alloy /
- MMC /
- High-frequency internal friction