B_(4)C增强Al/Mg层状复合材料的制备、组织和性能研究  

Preparation,Structure and Properties of B_(4)C Reinforced Al/Mg Laminated Composites

作　　者：周秉文[1,2] 宋焕骁 景栋 孟令刚 亚斌[1] 张兴国[1,2] ZHOU Bingwen;SONG Huanxiao;JING Dong;MENG Linggang;YA Bin;ZHANG Xingguo(School of Materials Science and Engineering,Dalian University of Technology,Dalian 116023;Ningbo Institute of Dalian University of Technology,Ningbo 315016)

机构地区：[1]大连理工大学材料科学与工程学院,大连116023 [2]大连理工大学宁波研究院,宁波315016

出　　处：《特种铸造及有色合金》2024年第8期1071-1076,共6页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51971049)。

摘　　要：以AZ31箔片、Al粉、B_(4)C粉末为原材料制备了B_(4)C增强的Al/Mg层状复合材料(B_(4)C@Mg/Al-MIL),研究了热压温度以及B_(4)C含量等对复合材料组织结构、力学性能的影响并分析其强化机理。结果表明,B_(4)C含量为40%时复合材料性能最佳,抗弯强度为347 MPa,比强度为192 kN·m/kg,冲击韧度为19 J/cm^(2),相对于基体(Mg/Al-MIL)均有较大提升,抗拉强度则达到212 MPa。B_(4)C颗粒通过载荷传递作用,促使脆性相破碎吸能、引导多重隧道裂纹生成,改善了脆性金属间化合物对层状复合材料的负面影响。B_(4)C reinforced Al/Mg layered composites(B_(4)C@Mg/Al-MIL)were fabricated with AZ31 foil,Al powder and B_(4)C powder as raw materials.Effects of hot-pressing temperature and B_(4)C content on microstructure and mechani⁃cal properties of the composites were investigated and strengthening mechanism were described.The results indicate that the optimal performance is achieved with 40%B_(4)C content in the mixed powder,where the bending strength is 347 MPa,specific strength is 192 kN·m/kg,and the impact toughness is 19 J/cm^(2),which are greatly enhanced com⁃pared to the matrix(Mg/Al-MIL),while tensile strength reaches 212 MPa.B_(4)C particles promote the brittle phase to break and absorb energy,and induce the formation of multiple tunnel cracks through load transfer,improving the nega⁃tive impact of brittle intermetallic compounds on laminated composites.

关 键 词：层状复合材料 颗粒增强 力学性能 强化机理 

分 类 号：TB331[一般工业技术—材料科学与工程] TG113.25[金属学及工艺—物理冶金]