%0 Journal Article
%T 皮秒激光织构化PCD复合片表面组织结构的研究<br>Study on the Microstructure and Bonding Structure of the Picosecond-Laser-Textured PCD Surface
%A 李伟秋
%A 张国立
%A 肖扬
%A 廖嘉诚
%A 彭继华
%A 鲁艳军
%J Material Sciences
%P 675-683
%@ 2160-7621
%D 2021
%I Hans Publishing
%R 10.12677/MS.2021.115078
%X 采用皮秒激光多道次扫描PCD表面获得两种不同深度的槽型表面织构，即CG50和CG150。采用立体光学显微镜、轮廓仪、场发射扫描电镜、拉曼光谱仪等表征样品的表面形貌、组织结构、化学键合结构和表面金刚石相质量R。结果表明皮秒激光加工PCD表面沟槽织构导致表面疏松，粗糙度增加。虽然CG50织构的表面化学成分与未经织构加工的PCD一致，但CG150的表面碳含量急剧下降，Co大幅度上升。皮秒激光织构化过程导致PCD表面石墨化，且织构不同位置处石墨化程度有差异：槽底和槽壁发生相对严重的石墨化。CG150织构的顶部R值达到13.91，甚至超过未经织构加工的PCD样片的R值11.27。<br />
The surface microstructure evolution during laser texturing is important for practical application. In this study, two kinds of textures of groove with depth 50 ？m and 150 ？m, namely CG50 and CG150 were fabricated on the polycrystalline diamond compacts (PCD) specimens using picosecond laser machining tool. The surface morphology, microstructure, bonding structure of carbon, and the surface diamond phasequality R were characterized using stereo-optical microscope, light interference profile instrument, field emission scanning electron microscope and Raman spectro-scope before and after texturing. R value is defined to be the ratio of intensity of the diamond phase and that of the graphite phase, which relates to the fraction and grain quality of the diamond phase in the surface zone. It is found that, there is a looser layer on the textured surfaceafter picosecond laser texturing, whether it is CG50 or CG150. Laser texturing results in transformation of the surface diamond to graphite phase, which varies with the location of the texture. Usually, the surface graphitization at the bottom and the wall-side of the texture is much severely than that at the top. The R value of the groove shoulder of CG150 is 13.91, which is higher than that (11.27) of the pristine specimen. This is probably responsible for the geometry of the texture, as well as the thermal conductivity difference between the diamond and graphite.
%K PCD复合片，表面织构，皮秒激光加工，组织结构，键合结构<br>Polycrystalline Diamond Compact
%K Surface Texture
%K Picosecond Laser
%K Microstructure
%K Bonding Structure
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=42729