B4C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 B4C Reinforced Al/Mg Laminated Composites
周秉文 1宋焕骁 2景栋 2孟令刚 2亚斌 2张兴国1
作者信息
- 1. 大连理工大学材料科学与工程学院,大连 116023;大连理工大学宁波研究院,宁波 315016
- 2. 大连理工大学材料科学与工程学院,大连 116023
- 折叠
摘要
以AZ31箔片、Al粉、B4C粉末为原材料制备了B4C增强的Al/Mg层状复合材料(B4C@Mg/Al-MIL),研究了热压温度以及B4C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,B4C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/cm2,相对于基体(Mg/Al-MIL)均有较大提升,抗拉强度则达到212 MPa.B4C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.
Abstract
B4C reinforced Al/Mg layered composites(B4C@Mg/Al-MIL)were fabricated with AZ31 foil,Al powder and B4C powder as raw materials.Effects of hot-pressing temperature and B4C 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%B4C 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/cm2,which are greatly enhanced com-pared to the matrix(Mg/Al-MIL),while tensile strength reaches 212 MPa.B4C 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Key words
Laminated Composites/Particle Reinforcement/Mechanical Properties/Strengthening Mechanism引用本文复制引用
基金项目
国家自然科学基金资助项目(51971049)
出版年
2024
NETL
NSTL
万方数据