W/Fe功能梯度材料的制备与性能  

Preparation and properties of W/Fe functionally gradient materials

作　　者：陈伦 杨晓亮 陈龙庆[2] 唐毅[2] 宋阳一鹏 瞿晓勤 唐军[1] CHEN Lun;YANG Xiao-liang;CHEN Long-qing;TANG Yi;SONG Yang-yi-peng;QU Xiao-qin;TANG Jun(College of Physics,Sichuan University,Chengdu 610064,China;Key Laboratory of Radiation Physics and Technology of Ministry of Education,Institute of Nuclear Science and Technology,Sichuan University,Chengdu 610065,C hina;Sichuan Ruiqin Business Management Co Ltd,Chengdu 610000,China)

机构地区：[1]四川大学物理学院,四川成都610064 [2]四川大学原子核科学技术研究所教育部辐射物理与技术重点实验室,四川成都610065 [3]四川睿钦企业管理有限公司,四川成都610000

出　　处：《材料热处理学报》2019年第11期102-107,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(11775149,11475118)

摘　　要：采用放电等离子体烧结(SPS)技术,在1050℃下成功制备出了5层W/Fe功能梯度材料,并通过钎焊与纯W结合。采用光学显微镜、扫描电镜和显微硬度计等研究了W/Fe功能梯度材料的表面形貌、断口形貌及硬度。结果表明:所制备的W/Fe功能梯度材料的成分和显微硬度符合梯度变化趋势;纯W层与钎料层间界面平整无孔洞及裂纹,只有少量W扩散至钎料层,而80W20Fe层与钎料层间的界面出现较多宏观孔洞,并出现相互扩散行为。随着W含量的增加,W/Fe功能梯度材料的断裂行为从韧性断裂(316L钢层)到部分韧性断裂(W含量20%),再到完全脆性断裂(纯W层)。A five-layer W/Fe functional gradient materials were successfully prepared at 1050 ℃ by spark plasma sintering(SPS) technique, and then bonded with pure W by brazing. Surface morphology, fracture morphology and hardness of the W/Fe functional gradient materials were studied by means of optical microscope, scanning electron microscopy and microhardness tester. The results show that the composition and microhardness of the prepared W/Fe functional gradient materials conform to the gradient trend, and the interface between the pure W layer and the brazing filler layer is smooth and free of holes and cracks, and only a small amount of W diffuses to the solder layer, and the interface between the 80 W20 Fe layer and the brazing filler layer appears more macropores, and a interdiffusion behavior occurs. With the increase of W content, the fracture behavior of the W/Fe functional gradient materials is from ductile fracture(316 L steel layer) to partial ductile fracture(W content of 20%), and then to complete brittle fracture(pure W layer)

关 键 词：功能梯度材料 放电等离子体烧结(SPS) 钎焊 

分 类 号：TG146.4[一般工业技术—材料科学与工程] TL62[金属学及工艺—金属材料]