粉煤灰泡沫陶瓷铝基复合材料的制备及界面结合研究  

Preparationof Co-continuous fly ash/Al-alloy composites and their interface bonding

作　　者：叶何远[1,2] 闫洪[1,2] 诸建彬[1,2] 

机构地区：[1]南昌大学机电工程学院材料加工工程系,南昌330031 [2]南昌市轻合金材料制备与加工重点实验室,南昌330031

出　　处：《功能材料》2015年第21期21036-21040,共5页Journal of Functional Materials

基　　金：江西省教育厅落地计划资助项目(KJLD14003);江西省高等学校科技创新团队资助项目(00008713)

摘　　要：以粉煤灰泡沫陶瓷作为增强相,以铝硅合金作为基体材料,采用挤压铸造工艺制备出粉煤灰泡沫陶瓷铝硅合金复合材料.研究了相同浇注温度不同基体材料以及同种基体材料不同浇注温度因素下复合材料界面结合的情况. 结果表明,以亚共晶铝硅合金（ZL101）、共晶铝硅合金（ZL102）和过共晶铝硅合金（Al-23Si）作为基体材料均能制备出界面结合良好的复合材料,并且界面之间形成了一组织紧密的硅相过渡带;粉煤灰泡沫陶瓷铝硅合金复合材料的界面结合机构是机械联锁结合、存在扩散层和界面反应的混合机构;铝硅合金与粉煤灰泡沫陶瓷的界面结合能力随着温度的升高而提高,在温度低于780℃的情况下,界面易出现分离现象,780-810℃为较佳浇注温度.Co-continuous fly ash/Al-alloy composites were fabricated by squeeze casting method.Fly ash ceramic foam and Al-Si alloy were selected as the reinforcement and the matrix material,respectively.The interface bonding of the composites was studied at the factor of different matrix material and pouring temperature.The results show that the composites with well interface bonding can be fabricated as the hypoeutectic Al-Si alloy(ZL101),eutectic Al-Si alloy(ZL102)and hypereutectic Al-Si alloy(Al-23Si)are chosen for the matrix material.A transition zone with compact silicon phase is formed in the interface.The mechanism of the composites' interface bonding is mixed,it exists mechanical interlock permeating layer and interfacial reaction.The bonding capacity of Al-Si alloy and fly ash ceramic foam increases with the increasing of temperature.Under the condition of the temperature is below to 780℃,the interface was easy to separate.The appropriate pouring temperature was 780-810 ℃.

关 键 词：粉煤灰泡沫陶瓷 铝硅合金 基体材料 复合材料 界面结合 

分 类 号：TM285[一般工业技术—材料科学与工程]