摘要
采用原位合成法制备硼化合物增强Mg-Li基复合材料,分析了该法制备的复合材料铸锭中气孔和缩孔形成的原因。通过改变工艺参数和添加稀土元素Y,研究了其对复合材料的铸锭质量的影响。实验结果表明:通过减少反应后期的搅拌时间,可减少气孔数量和镁的挥发;增加铸锭高度,可提高铸锭利用率;添加稀土元素Y,可减少缩孔和气孔,其铸锭晶粒尺寸也明显减小,铸锭质量得到显著提高。
The pores and shrinkage cavities of the ingot of Mg-Li based composite material,which was reinforced by the boron compound in situ reacted,were investigated.The influence of the synthesis process and addition of rare earth Y on the ingot quality of the composite materials was researched.The results showed that the pores number and evaporation of magnesium could be depressed by decrease the stirring time in the later stage of reaction synthesis while the viscosity of the melt becomes great;utilizing ratio of ingot could be increased by increasing the height of ingot.The quality of the ingot was improved greatly through decreasing pores,shrinkage cavities numbers and the grain size by addition few of rare earth Y.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2013年第1期20-25,共6页
Journal of the Chinese Society of Rare Earths
关键词
Mg-Li基复合材料
B4C
原位合成
稀土Y
气孔
缩孔
Mg-Li based composite materials
B4C
in-situ reaction
rare earth Y
pore
shrinkage cavity
