ABSTRACT

Intensive development of furniture industry results in the need to produce tolls with increasingly better properties which allow to increase production efficiency. One of the prospective paths of development of blades for machining wood-based materials are the WCCo composites with dispersed diamond particles. Cemented carbide matrix of composites will ensure high resistance to abrasive wear and brittle fracture whereas the diamond particles – high hardness.

The study investigated the effect of amount of diamond to density, micro-structure and phase composition of the WCCo/diamond composites obtained by the prototype PPS (Pulse Plasma Sintering) method. The composites were consolidated at temperature 1100°C, under vacuum. Density measurements were carried out by means of Archimedes method, the phase composition – by XRD method, whereas the observations of the micro-structure were carried out with the use of SEM microscope. Observation of diamond – WCCo matrix boundary was carried out by means of high-resolution electron microscopy. The tests revealed that the higher the diamond content, the lower density of the sinters. Composites with 30% vol. of diamond were characterized by higher density. XRD analysis showed occurrence of three phases: C (diamond), WC and Co.

摘要

家具行业的密集发展导致需要生产具有越来越好的特性的通行证，以提高生产效率。用于加工木质材料的刀片的发展前景之一是具有分散金刚石颗粒的 WCCo 复合材料。复合材料的硬质合金基体将确保高耐磨性和抗脆性断裂，而金刚石颗粒则具有高硬度。

该研究调查了金刚石用量对通过原型 PPS（脉冲等离子烧结）方法获得的 WCCo/金刚石复合材料的密度、微观结构和相组成的影响。复合材料在真空下在 1100°C 的温度下固结。密度测量通过阿基米德法进行，相组成通过 XRD 方法进行，而微观结构的观察则使用 SEM 显微镜进行。金刚石-WCCo 基体边界的观察是通过高分辨率电子显微镜进行的。测试表明，金刚石含量越高，烧结体的密度越低。复合材料 30% vol。金刚石的特点是密度较高。XRD 分析显示出现三相：C（金刚石）、WC 和 Co。