PDC性能优化及其钎焊技术研究现状

Research Status of Performance Optimization of Polycrystalline Diamond Compact

聚晶金刚石复合片(PDC)因其优良的性质,广泛应用于机械加工、能源开采、地质勘探等方面。但是PDC温度敏感性较高,在高温下内部残余应力增大、金刚石层发生氧化、石墨化等现象,导致PDC金刚石骨架撕裂、金刚石颗粒剥落、甚至复合片失效。从PDC表面改性、粘结剂优化、PDC结构设计、晶粒细化以及PDC钎焊技术等五个方面综述了PDC国内外研究现状,讨论了PDC存在的共性问题,并对未来的研究方向进行了展望。

Polycrystalline diamond compact(PDC)is widely used in machining,energy mining,geological exploration and so on because of its excellent properties.However,PDC had high temperature sensitivity.At high temperature,the internal residual stress increases,the oxidation and graphitization of diamond layer occur,which leads to the tearing of PDC diamond skeleton,the peeling of diamond particles,and even the failure of composite sheet.the current status of PDC research at home and abroad this paper is reviewd from five aspects,including surface modification of PDC,binder optimization,PDC structure design,grain refinement and PDC brazing technology,the common problems of PDC are discussed and the future research direction is prospected.