压制压力及烧结工艺对SiC_p/2024铝基复合材料组织和性能的影响
Effects of Pressing Pressure and Sintering Process on Structures and Properties of SiC_p/2024 Aluminum Composite

以氮气雾化微细球形铝合金粉及SiC为主要原材料，通过压制、烧结工艺制备出SiC_p增强2024铝基复合材料，研究了压制压力、烧结升温速率、烧结保温时间等因素对SiC_p增强2024铝基复合材料组织和性能的影响。结果表明，利用粉末冶金工艺压制铝基复合材料烧结收缩率主要受压制压力影响，随着压制力的增大而减少；烧结升温速率对材料强度影响不明显，而烧结收缩率随升温速率提高呈上升趋势；为提高生产效率，在升温速度为10℃/min条件下，验证适宜的保温时长，能达到材料预期的材料强度。
Using nitrogen atomized micro-fine spherical aluminum alloy powder and SiC as the main raw materials, SiC_p/2024 aluminum composite was prepared by pressing and sintering process. The effects of pressing pressure, sintering heating rate, sintering holding time and other factors on the microstructure and properties of SiC_p reinforced 2024 aluminum matrix composite were studied. The results show that the sintering shrinkage of aluminum matrix composites is mainly affected by the pressing pressure, and decreases with the increasing of the pressing force, while the sintering heating rate has no obvious effect on the shrinkage and strength of the composites. In order to improve the production efficiency, under the condition of heating rate of 10？C/min, the appropriate insulation time was verified to achieve the ideal material strength.