自蔓延高温合成法制备金刚石工具材料研究现状  

Research status of diamond tool materials prepared by self-propagating high-temperature synthesis

作　　者：武美玲 尹育航[1,2] 丁冬海 肖国庆 段锋[1] 彭凯[2] 杨潘 张立 敬臣 WU Mei-ling;YIN Yu-hang;DING Dong-hai;XIAO Guo-qing;DUAN Feng;PENG Kai;YANG Pan;ZHANG Li;JING Chen(College of Materials Science and Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Monte-Bianco Co Ltd,Foshan 528313,China)

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055 [2]广东奔朗新材料股份有限公司,广东佛山528313

出　　处：《材料热处理学报》2023年第5期1-15,共15页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(52272027);陕西省重点研发计划(2022GY-421);陕西省教育厅科研计划项目(20JY039)。

摘　　要：金刚石工具多采用热压烧结法制备,但此方法存在能耗高、结合剂对金刚石的把持力弱、石墨模具污染环境等缺点。自蔓延高温合成法(SHS)不仅具有高效、节能的优点,而且反应过程中产生的瞬时高温有助于金刚石表面形成碳化物,能使结合剂与金刚石形成化学冶金结合。因此,SHS制备金刚石工具受到广泛关注。本文首先基于相关体系的热力学参数(绝热温度),分析了SHS制备金刚石工具的可行性;综述了原料配比、稀释剂、金刚石浓度及排布方式、引燃方式及碳化物的形成等因素对Ni-Al、Ti-Al及Fe-Al体系SHS制备金刚石工具材料的影响;然后,对比了所制得的金刚石工具材料的性能。最后,展望了SHS制备金刚石工具材料潜在的研究方向,提出了抑制SHS反应过程中金刚石石墨化的方法。Diamond tools are usually prepared by hot pressing sintering method,but this method has many shortcomings,such as high energy consumption,weak holding force between binder and diamond,and graphite mold polluting the environment.Self-propagating high-temperature synthesis(SHS)not only has the advantages of high efficiency and energy saving,but also the instantaneous high temperature generated in the reaction process helps to form carbides on the diamond surface,which can enable the binder to form a chemical metallurgical combination with the diamond.Therefore,SHS preparation of diamond tools has received extensive attention.Firstly,based on the thermodynamic parameters(adiabatic temperature)of related systems,the feasibility of SHS for preparing diamond tools is analyzed.The effects of raw material ratio,diluent,diamond concentrations and arrangement in the green bodies,ignition method and carbide formation on diamond tool materials prepared by SHS in Ni-Al,Ti-Al and Fe-Al systems are reviewed.Then,the properties of the as-prepared diamond tool materials are compared.Finally,the potential research directions of diamond tool materials prepared by SHS are prospected,and the methods to inhibit diamond graphitization in the SHS reaction are proposed.

关 键 词：自蔓延高温合成 金属结合剂 金刚石工具 致密化 

分 类 号：TG711[金属学及工艺—刀具与模具]