The Investigation of Ultrahigh Pressuer Sintering of Cubic Boron Nitride with the Binding Agent of Si3N4

Abstract:

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Selecting Si3N4 as binding agent and Al2O3–Al–Y2O3 as sintering additives, the sintered compact of polycrystalline cubic boron nitride (PcBN) was studied . By modifying the ratio of each component and the parameters of the sintering process, the compact sintered at 4.5 GPa and 1650 °C showed good mechanical properties.The phase constitution, microstructure of the sintered compact were characterized by XRD and SEM respectively. The degree of phase transformation of Si3N4 , the chemical reaction during the sintering process, and the sintering mechanism of the additives were discussed . The best relative density is more than 97 % , the flexural strength is more than 650 MPa, the Vickers hardness Hv is more than 8.7 GPa.

Info:

Periodical:

Advanced Materials Research (Volumes 150-151)

Edited by:

Jinglong Bu, Zhengyi Jiang and Sihai Jiao

Pages:

1191-1194

DOI:

10.4028/www.scientific.net/AMR.150-151.1191

Citation:

S. J. Lin et al., "The Investigation of Ultrahigh Pressuer Sintering of Cubic Boron Nitride with the Binding Agent of Si3N4", Advanced Materials Research, Vols. 150-151, pp. 1191-1194, 2011

Online since:

October 2010

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$35.00

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