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.
作者
周秉文
宋焕骁
景栋
孟令刚
亚斌
张兴国
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)
出处
《特种铸造及有色合金》
CAS
北大核心
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)。
关键词
层状复合材料
颗粒增强
力学性能
强化机理
Laminated Composites
Particle Reinforcement
Mechanical Properties
Strengthening Mechanism
