TG and DSC analyses were performed to study thermal stability and specific heat capacity of red mud (RM) particle reinforced Al5083 alloy matrix composites. Metal matrix composites of different weight percentages of RM were blended by stir casting. The composites were processed by equi-channel angular extrusion using a die with an angle of 105° between channels and 30° at the outer curvature. The structural and mechanical behaviors of composites processed by ECAE were evaluated by SEM and hardness studies. Thermal analysis of composites before and after ECAP was performed by using DSC and TG–DTA. From the TG analysis, it was observed that the mass loss of the composites reduced with an increase in RM fraction. Thermal stability before ECAP was observed high up to a temperature of 250 °C and after ECAP high thermal stability retained up to a temperature of 350 °C. It was also observed that at higher fractions of RM, enthalpy and specific heat capacity of composites significantly reduced due to the reduction in the enrichment of RM particles with a matrix material of the composite.

进行了TG和DSC分析，以研究赤泥（RM）颗粒增强的Al5083合金基复合材料的热稳定性和比热容。通过搅拌铸造将不同重量百分比的RM的金属基复合材料混合。复合材料通过等通道角挤压加工，模具之间的通道角度为105°，外曲率角度为30°。通过SEM和硬度研究评估了ECAE处理的复合材料的结构和力学行为。使用DSC和TG-DTA对ECAP前后的复合材料进行热分析。从TG分析，观察到复合材料的质量损失随着RM分数的增加而减少。观察到ECAP在高达250°C的高温下的热稳定性，在ECAP之后在高达350°C的温度下保持高的热稳定性。还观察到，在RM的较高分数下，复合材料的焓和比热容由于复合材料的基质材料对RM颗粒的富集减少而显着降低。