砖-泥结构Ti/(Al_(3)Ti-AlTi_(3))微叠层复合材料的组织和力学性能  

Microstructure and Mechanical Properties of Ti/(Al_(3)Ti-AlTi_(3)) Laminate Composites with Brick and Mortar Structure

作　　者：景栋 孟令刚[1,2] 刘运峰 许金琛 张兴国 JINGDong;MENGLinggang;LIUYunfeng;XUJinchen;ZHANGXingguo(School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China;Ningbo Institute of Dalian University of Technology,Ningbo 315016,China)

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116024 [2]大连理工大学宁波研究院,浙江宁波315016

出　　处：《热加工工艺》2025年第7期70-74,共5页Hot Working Technology

摘　　要：采用真空热压烧结法制备了砖-泥结构Ti/(Al_(3)Ti-AlTi_(3))微叠层复合材料。利用XRD、EPMA和SEM对复合材料的组成相和显微组织进行了表征,并通过与层状结构Ti/(Al_(3)Ti-AlTi_(3))微叠层复合材料进行对比,研究了组元复合结构对微叠层材料弯曲性能的影响。结果表明:砖-泥结构Ti/(Al_(3)Ti-AlTi_(3))微叠层复合材料中,Al_(3)Ti和AlTi_(3)形成了多边形薄片组织,薄片在复合材料中交错堆叠分布,薄片中心为Al3Ti层,层厚76μm;薄片外层为AlTi_(3),层厚40μm,薄片长度1~2mm,相邻薄片间通过韧性的Ti连接。相比于层状结构微叠层复合材料,砖-泥结构复合材料抗弯强度和失效应变分别提升了82%和25%,弯曲强度为675.6MPa,弯曲失效应变为7%。Ti/(Al_(3)Ti-AlTi_(3))laminate composites with brick and mortar structure were prepared by vacuum hot pressing sintering method.The phase and microstructure of the composites were characterized by XRD,EPMA and SEM.The effects of the composite structure on the bending property of the composites were studied by comparing with the layered structure Ti/(Al_(3)Ti-AlTi_(3))laminate composites.The results show that in the brick-and-mortar structure Ti/(Al_(3)Ti-AlTi_(3))laminate composites,Al_(3)Ti and AlTi_(3) form polygonal platelet structure,and the platelets are interlaced and distributed in the composites.The center of the platelet is the Al_(3)Ti layer with a thickness of 76μm,the outer layer of the platelet is the AlTi_(3) layer with a thickness of 40μm,and the length of the platelet is 1-2 mm.The adjacent platelets are connected by ductile Ti.Compared with those of the layered structure laminate composites,the bending strength and failure strain of the brick-and-mortar composites are increased by 82%and 25%,respectively,with the bending strength of 675.6 MPa and the bending failure strain of 7%.

关 键 词：砖-泥结构 微叠层复合材料 显微组织 弯曲性能 

分 类 号：TB333.1[一般工业技术—材料科学与工程]