Houzhen Chen , Fuming Deng , Hui Xie , Xiaozhou Chen , Xiaotian Xing , Ziyi Liu , Wenli Deng , Junzhe Yu , Can Li
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引用次数: 0
Abstract
To investigate the effect of binder type on the interface and properties of PcBN composite, a series of PcBN composites with Al, TiN, Co, Ni, and W as binders were prepared under the conditions of 5.5–6 GPa, 1450–1550 °C, and 50 min, the interfacial bonding mechanism and material properties of PcBN composite were analyzed and discussed using SEM/EDS, XRD, and mechanical testing equipment. The results show that new phases are generated in the sintering of PcBN composites with different types of binders, which are uniformly distributed at the grain boundaries or in the interstices of grains to form a dense organization; cBN-cBN and cBN-TiN grain boundaries are formed in metal and ceramic binder PcBN, respectively, and the microhardness reaches 41.66 GPa at the highest level. In addition, the metal binder mainly diffuses by capillary force, while the ceramic binder mainly infiltrates with each other. This shows that the mutual infiltration of the phases within the PcBN material layer and the cemented carbide layer is the key factor in improving the interfacial bond strength.
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.
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