A study on effects of TiB 2 contents on reactive products and compressive strength of brazed CBN grains
2009; Wiley; Volume: 41; Issue: 3 Linguagem: Inglês
10.1002/sia.3013
ISSN1096-9918
AutoresWenfeng Ding, Jiuhua Xu, Zhenzhen Chen, Ze Cheng, Yucan Fu,
Tópico(s)Advanced ceramic materials synthesis
ResumoAbstract The composite fillers were prepared by means of mixing Ag‐Cu‐Ti alloy and TiB 2 reinforcing particles. Experimental study was conducted on the chemical reaction and the reactive products at the interface between CBN grains and the composite filler. The compressive strength measurement of brazed CBN grains was performed. Results obtained show that the TiB 2 particles disperse uniformly in the filler layer. Great influence of TiB 2 particles is made on the quantity of the reactive products formed on the surface of brazed CBN grains. The destruction of the sharp edges of grains is restrained. Depending on the compact and fine reactive compounds, hard joining is realized for the CBN grain and the filler layer. When the content of TiB 2 particles in the composite filler is 8 wt%, the thermal damage of the brazed CBN grains are controlled effectively. In this case the compressive strength of the brazed grains reaches 15.3 N, which is as high as that of the original ones. Copyright © 2009 John Wiley & Sons, Ltd.
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