Effects of Component on Dimensional Stability of SiCp/Al Composite during Temperature Change

The effects of matrix type and size of SiC particle on the dimensional stability of SiCp/Al composites were discussed in the temperature interval of 25～400℃.The results showed that the larger the dimension of SiC particle,the better the dimensional stability.And different kinds of metal element and their content had great diversity in their effect on dimensional stability,with the increase of content of Si and Mg,the dimensional stability of Al-Si and Al-Mg array composite was gradually increased.In this work,it was also found that AlMg matrix composite showed an excellent dimensional stability in time of monochromatic temperature change,composite based on three elements matrix(Al-Mg-Cu)showed an excellent dimensional stability in time of cycling temperature change.