基体合金对连续Al_2O_(3f)/Al复合材料微观组织及抗拉强度的影响  

Effect of Matrix Alloy on Microstructure and Tensile Strength of Continuous Al_2O_(3f)/Al Composite

作　　者：聂明明 徐志锋 王振军 余欢 蔡长春 王德清 Nie Mingming1, Xu Zhifeng1, Wang Zhenjun1, Yu Huanl, Cai Changchun1, Wang Deqing2(1. National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang 330063, China;2. Hubei Sanjiang Space Wanfeng Science ＆ technology Development Co., Ltd, Xiaogan 432009, China)

机构地区：[1]南昌航空大学轻合金加工科学与技术国防重点学科实验室,江西南昌330063 [2]湖北三江航天万峰科技发展有限公司,湖北孝感432009

出　　处：《稀有金属材料与工程》2018年第10期3063-3071,共9页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51365043);轻合金加工科学与技术国防重点学科实验室开放基金(GF201401002);江西省自然科学基金(20151BAB206004)

摘　　要：选用Nextel610型Al_2O_3纤维作为增强体,采用真空气压浸渗法制备了纤维体积分数为40%、基体合金分别为1A99、ZL210A、ZL301及7075合金的单向连续Al_2O_(3f)/Al复合材料,并用NaOH溶液萃取出Al_2O_3纤维,研究了基体合金对连续Al_2O_(3f)/Al复合材料的致密度、纤维损伤及抗拉强度的影响。结果表明:基体合金对连续Al_2O_(3f)/Al复合材料的致密度和微观组织有明显影响,其中连续Al_2O_(3f)/ZL301复合材料致密度最高为99.2%,组织缺陷最少;连续Al_2O_(3f)/1A99复合材料致密度最低,为96.8%,这种差异是由于不同基体与纤维之间的润湿性不同导致的。不同基体与纤维发生了不同程度的界面反应,最后表现为对纤维的损伤程度不同。连续Al_2O_(3f)/1A99、Al_2O_(3f)/ZL210A、Al_2O_(3f)/ZL301及Al_2O_(3f)/70754种复合材料的抗拉强度分别为465、479、680和389 MPa,缺陷、纤维损伤和界面结合强度是影响连续Al_2O_(3f)/Al复合材料抗拉强度的主要因素。The vacuum gas pressure infiltration was performed on the continuous Al2O3f/Al composite with a fiber volume fraction of 40%and using Nextel610-Al2O3 fiber as the reinforcing material.Al2O3 fibers were extracted using NaOH solution,and the matrix alloys were1A99,ZL210A,ZL301 and 7075 alloys.The effects of matrix alloy on the relative density,fiber damage and tensile strength of continuous Al2O3f/Al composites were studied.The results show that different matrix alloys have an obvious influence on the relative density and microstructure of the composites.The continuous Al2O3f/ZL301 composite has the highest relative density of 99.2%and the least defects.The relative density of the continuous Al2O3f/1A99 composite is the lowest,96.8%.The main reason for this difference is the wettability between the matrix and the fiber.The degree of interfacial reaction between different matrices and fiber is different.Eventually,the damage degree of the fiber is different.The tensile strength of continuous Al2O3f/1A99,Al2O3f/ZL210A,Al2O3f/ZL301 and Al2O3f/7075 are465,479,680 and 389 MPa,respectively.The defect,interfacial reaction degree and the fiber damage are the main factors to determine the tensile strength of the composite.

关 键 词：基体合金 Al2O3f/Al复合材料 致密度 微观组织 纤维损伤 抗拉强度 

分 类 号：TB333[一般工业技术—材料科学与工程] TG146.21[金属学及工艺—金属材料]