Composition, microstructure and mechanical properties of PcBN composites with Al- Zr binder

IF 4.2 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Refractory Metals & Hard Materials Pub Date : 2024-06-29 DOI:10.1016/j.ijrmhm.2024.106778

Peicheng Mo, Jiarong Chen, Kai Li, Jun Zhang, Xiaoyi Pan, Chao Chen

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Abstract

The cBN, Zr, and Al powders were mixed to synthesize PcBN (polycrystalline cubic boron nitride) tool material under high-temperature, ultra-high-pressure conditions. X-ray diffraction and scanning electron microscopy were used to analyze the phase composition and microstructure of the tool material. The mechanical properties and microstructural trends of the tool material at various temperatures were investigated. Research indicates the formation of new phases in the PcBN material following high-temperature and ultra-high-pressure sintering. However, there is no significant difference in the types of formed new phases, all of which consist of BN, ZrB₂, ZrN, and AlN. The sintering density of the tool material was higher at 1500 °C and 1600 °C, and the mechanical properties improved with increasing sintering temperature. The highest number of tool processing parts made of PcBN tool material synthesized at 1600 °C is 232.

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含 Al- Zr 粘结剂的 PcBN 复合材料的成分、微观结构和力学性能

在高温、超高压条件下，将 cBN、Zr 和 Al 粉末混合合成 PcBN（多晶立方氮化硼）工具材料。利用 X 射线衍射和扫描电子显微镜分析了工具材料的相组成和微观结构。研究了工具材料在不同温度下的机械性能和微观结构变化趋势。研究表明，在高温和超高压烧结后，PcBN 材料中形成了新的相。然而，所形成的新相类型没有明显差异，均由 BN、ZrB2、ZrN 和 AlN 组成。工具材料的烧结密度在 1500 ℃ 和 1600 ℃ 时更高，机械性能随烧结温度的升高而改善。在 1600 ℃ 下合成的 PcBN 工具材料制成的工具加工零件数量最多，达到 232 个。

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来源期刊

$International Journal of Refractory Metals & Hard Materials$

International Journal of Refractory Metals & Hard Materials 工程技术-材料科学：综合

CiteScore

7.00

自引率

13.90%

发文量

236

审稿时长

35 days

期刊介绍： The International Journal of Refractory Metals and Hard Materials (IJRMHM) publishes original research articles concerned with all aspects of refractory metals and hard materials. Refractory metals are defined as metals with melting points higher than 1800 °C. These are tungsten, molybdenum, chromium, tantalum, niobium, hafnium, and rhenium, as well as many compounds and alloys based thereupon. Hard materials that are included in the scope of this journal are defined as materials with hardness values higher than 1000 kg/mm2, primarily intended for applications as manufacturing tools or wear resistant components in mechanical systems. Thus they encompass carbides, nitrides and borides of metals, and related compounds. A special focus of this journal is put on the family of hardmetals, which is also known as cemented tungsten carbide, and cermets which are based on titanium carbide and carbonitrides with or without a metal binder. Ceramics and superhard materials including diamond and cubic boron nitride may also be accepted provided the subject material is presented as hard materials as defined above.