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本文主要采用接触反应法制备了TiC/Al和TiC/Al-12Si-4Cu复合材料；使用光学显微镜(OM)，扫描电镜(SEM)对材料的微观组织形貌及颗粒分布进行观察分析，通过X射线衍射仪(XRD)分析了复合材料相的组成。
200℃-1000℃的温度区间的差热分析曲线表明：TiC-Al粉末体系在加热过程中没有发生反应，并且改变Al粉含量对于曲线是无影响的。（TiC-Al）粉末体系烧结产物的XRD结果表明，TiC与Al发生了化学反应，产物是AlTi3和Al4C3。Ti-Al粉末体系制备纯铝基体复合材料时，反应体系会发生原位反应生成TiAl3组织；TiC-Al粉末体系制备纯铝基体复合材料时，即使熔体温度发生改变，铝熔体中TiC颗粒也是稳定的；TiC-Al粉末体系制备Al-12Si-4Cu基体复合材料时，铝熔体中TiC颗粒是不稳定的。
关键词：TiC/Al复合材料，TiC颗粒，稳定性
Study on stability of TiC particles in moltenaluminum
Abstract
In this paper，TiC / Al and TiC/Al-12Si-4Cu composites were prepared by contact reaction method；The microstructure and particle distribution of the materials were observed and analyzed by using optical microscopy (OM) and scanning electron microscopy (SEM). The composition of the composite phase was analyzed by X ray diffractometer(XRD).
The differential thermal analysis curveof the temperature range at 200 -1000℃ indicateed that:TiC-Al powder systemdid not reactin the heating process，and the change of Al contenthad no effect on the curve，XRD results of the sintered product of TiC-Al powder system showed that TiC could reactwith Al，and the products were AlTi3 and Al4C3，When the preparation of pure aluminum matrix composites in Ti-Al powder system,the reaction system will generate reaction and occured TiAl3 organization.WhenTiC-Al powder system for the preparation of pure aluminum matrix composites, even if the melt temperature changes, the TiC particles in the aluminum melt are stable.When TiC-Al powder system to prepare Al-12Si-4Cu matrix composites，the TiC particles in the aluminum melt are unstable.
Key Words: the TiC/Al composite materials，TiC particles，Stability
本文来源：https://www.wddqxz.cn/9e412bc6710abb68a98271fe910ef12d2af9a92f.html
2023-01-27
