工艺因素对B_4C-AlB_(12)-Al复合材料力学性能的影响  

Effect of process factors on mechanical properties of B_4C-AlB_(12)-Al composites

作　　者：王东山[1] 薛向欣[1] 杨合[1] 张莹[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁省高校硼资源生态化综合利用技术与硼材料重点试验室

出　　处：《材料与冶金学报》2008年第3期182-186,191,共6页Journal of Materials and Metallurgy

摘　　要：采用粉末冶金法,以B粉、Al粉、B4C粉为原料,在高纯氩气保护条件下,烧结制备了B4C-AlB12-Al复合材料。利用XRD和SEM对其物相组成和显微结构进行表征,研究了初始原料中Al加入量、烧结时间、烧结温度对材料力学性能的影响.结果表明:烧结试样中除含有B4C,AlB12,Al外,还含有Al3BC和少量Al2O3相;升高温度和延长烧结时间均不利于提高材料的抗弯强度;随原料中Al加入量的增加,材料的力学性能先增加后降低,原料中Al加入量(质量分数)为39.71%时试样的硬度最高为661.43 MPa,Al加入量为45.85%时抗弯强度最高达64.15 MPa.By powder metallurgy, B4C-AlB12-Al composites were prepared by sintering boron powder, aluminium powder and boron carbide powder as raw materials under highly pure argon atmosphere. The mineral phase composition and mierostructure were characterized using XRD and SEM. The effects of Al content addition, sintering time and sintering temperature on the mechanical properties of sintering products were studied. The results show that there are not only B4C, AlB12 and Al, but also Al3BC and small amount of Al2O3 phases in the sintered samples. It is disadvantageous for the bend strength of product to increase the temperature and time of sintering. The mechanical properties increase firstly and then decrease with Al addition increasing. The highest hardness of product samples is 661.43 MPa with 39.71% Al addition, and the bend strength reaches to 64. 15 MPa with 45. 85% Al addition in raw materials.

关 键 词：粉末冶金 B4C AlB12 AL 陶瓷-金属复合材料 

分 类 号：TB331[一般工业技术—材料科学与工程]