摘要
采用液相压力浸渍工艺制备出碳化硅颗粒(SiCp)和硅酸铝短纤维(Al2O3·SiO2f)混杂增强的镁基复合材料,研究了其机械与阻尼性能。发现镁基复合材料的强度与纯镁相比得到了显著的改善,而阻尼性能有所降低。并且2个弛豫内耗峰存在于复合材料试样中,出现在约150℃的峰Ⅰ不仅存在于纯镁试样中而且还存在于其复合材料试样中,认为其与位错的运动有关;出现在约250℃的峰Ⅱ仅存在于复合材料的试样中,分析认为是由于碳化硅颗粒与镁基体的界面滑移所致。
Magnesium matrix composites reinforced with hybrid SiCp and Al2O3·SiO2f were fabricated by the liquid pressure infiltration technique, their mechanical property and damping capacity were then studied. It was found that the strength of magnesium matrix composites was improved markedly as compared with that of pure magnesium, but their damping capacities decreased. Moreover, two relaxation damping peaks were found in the composite samples, peak I on about 150℃ appeared not only in pure magnesium but also in its composites, which was related to the dislocation movement; peak II on about 250℃ appeared only in Mg matrix composites, which was attributed to the interface slip between SiC particulate and Mg matrix.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第9期1423-1426,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金(50271043)
"863"项目(2002AA334010)
关键词
镁基复合材料
阻尼性能
内耗峰
metal matrix composite
damping capacity
damping peak
