Effect of titanium content on microstructure and mechanical properties of PcBN synthesized in cBN-Si3N4-Ti systemEinfluss des Titangehaltes auf das Gefuge und die mechanischen Eigenschaften von in einem cBN-Si3N4-Ti-System synthetisiertem PcBN

被引：6

作者：

Chen, C. ^{[1
]}

Mo, P. C. ^{[2
]}

Wang, P. ^{[3
]}

Wu, Y. ^{[1
]}

Zhong, S. L. ^{[1
]}

Li, Z. K. ^{[1
]}

机构：

[1] Guilin Univ Technol, Sch Mat Sci & Engn, Jiangan Rd, Guilin 514004, Peoples R China

[2] China Non Ferrous Met Guilin Geol & Min Co Ltd, R&D Dept, Tieshan Rd, Guilin 541004, Peoples R China

[3] Zigong Cemented Carbide Co Ltd, R&D Ctr, Daan Dist Renmin Rd, Zigong 643011, Peoples R China

来源：

MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK | 2020年 / 51卷 / 03期

关键词：

PcBN; bonding agent; high temperature ultrahigh pressure; microstructure; mechanical properties; COMPOSITES; PRESSURE; NITRIDE;

D O I：

10.1002/mawe.201900089

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, Polycrystalline cubic boron nitride (PcBN) is prepared under a high temperature and an ultra-high pressure. The influence of different titanium (Ti) content on composition, microstructure, porosity and mechanical property of the PcBN is investigated by means of x-ray diffraction, field emission scanning electron microscopy and energy dispersive spectroscopy. The results show that, with the addition of titanium, the cubic boron nitride (cBN) particles are connected with each other by the product phases beta-Si3N4, TiN and TiB2 under the pressure of 5.5 GPa and the temperature of 1600 degrees C. As the increase of titanium content in the system, the amount of rod-like crystal beta-Si3N4 and TiB2 formed in the system increases, while the porosity remarkably decreases. When the titanium content is 13 wt%, PcBN presents the best comprehensive performance, hardness and flexural strength are 29.2 GPa and 1022.5 MPa, respectively.

引用

页码：391 / 399

页数：9

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