论文部分内容阅读
用挤压铸造法制备了Al_2O_3·SiO_2纤维增强铸造铝合金内燃机活塞材料,测定了它在不同温度环境下的抗拉强度及延伸率。结果表明,在高温环境下,复合材料才能体现出其拉伸强度高的优越性。用SEM观察了复合材料的断口形貌。研究发现,随着温度升高,材料的延伸率提高在一定程度上能够缓和拉伸时在界面处形成高的应力集中,从而表现出强界面结合,增强效果明显。
Piston material of Al 2 O 3 · SiO 2 fiber reinforced cast aluminum internal combustion engine was prepared by extrusion casting method. The tensile strength and elongation of Al 2 O 3 · SiO 2 fiber reinforced aluminum alloy internal combustion engine were measured. The results show that under high temperature environment, the composite material can reflect the superiority of high tensile strength. The fracture morphology of the composites was observed by SEM. It is found that with the increase of the temperature, the elongation of the material can ease the stress concentration at the interface to a certain extent and thus show a strong interface combination with obvious enhancement effect.