金刚石粒度对用于木质材料加工工具的WC-Co/金刚石复合材料基本性能的影响

Influence of Diamond Grain Size on the Basic Properties of WC-Co/Diamond Composites Used in Tools for Wood-Based Materials Machining.

作者信息

Wachowicz Joanna, Wilkowski Jacek

机构信息

Department of Mechanical Processing of Wood, Institute of Wood Sciences and Furniture, Warsaw University of Life Sciences, Nowoursynowska Street, 166, 02-787 Warsaw, Poland.

出版信息

Materials (Basel). 2022 May 17;15(10):3569. doi: 10.3390/ma15103569.

DOI:10.3390/ma15103569

PMID:35629595

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9146001/

Abstract

The paper presents the effect of diamond particle size (varying between 2.5 µm and 20 µm) on the microstructure, density and hardness of WC-Co/diamond composites. The obtained materials contained 30% vol. diamond. The advanced sintering method Pulse Plasma Sintering (PPS) was used for the production of composites. The sintering process was carried out in two stages at a pressure of 50 and 100 MPa and a temperature of 1050 °C. Depending on the size of the diamond particles, composites with a density of 91-99% were obtained. Microstructure studies were performed employing scanning electron microscopy, along with an analysis of the chemical composition in micro-areas. Additionally, the phase composition was investigated by means of X-ray diffraction. In addition, hardness tests were performed. It was found that the size of the diamond particles significantly influenced the microstructure of the tested materials, as well as the density and hardness. As a result of PPS sintering of composites containing the finest diamond particles (2.5-5 µm), the presence of a metastable type of diamond-graphite was found.

摘要

本文介绍了金刚石粒度（在2.5 µm至20 µm之间变化）对WC-Co/金刚石复合材料微观结构、密度和硬度的影响。所制备的材料含有30%体积分数的金刚石。采用先进的烧结方法——脉冲等离子烧结（PPS）来制备复合材料。烧结过程分两个阶段进行，压力为50和100 MPa，温度为1050 °C。根据金刚石颗粒的尺寸，获得了密度为91 - 99%的复合材料。利用扫描电子显微镜进行微观结构研究，并对微区化学成分进行分析。此外，通过X射线衍射研究相组成。另外，还进行了硬度测试。结果发现，金刚石颗粒的尺寸对测试材料的微观结构以及密度和硬度有显著影响。由于对含有最细金刚石颗粒（2.5 - 5 µm）的复合材料进行了PPS烧结，发现存在亚稳态的金刚石 - 石墨。