Paper Title:
Silicon Nitride/Boron Nitride Composite by Combustion Synthesis
  Abstract

Machinable silicon nitride/ hexahedral boron nitride (Si3N4/h-BN) composites were in-situ synthesized in a nitrogen (N2) atmosphere by means of combustion synthesis gas-solid reaction with silicon (Si) powder and h-BN as raw materials. The effect of the volume fraction of h-BN on the machinable properties of Si3N4/BN composite was studied. The results show that Si powder was fully nitrified and no residual Si was found. Microstructures by a scanning electron microscopy (SEM) show Columnar crystals of β-Si3N4 are the main phase and acicular crystals of h-BN disperse β-Si3N4 intergranular. With the increasing of the volume content of h-BN, the machinability of the composite increases, but the bending strength of composite decreases firstly and then increases. The lowest bending strength is 84.96MPa at 25% volume fraction of h-BN.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
531-534
DOI
10.4028/www.scientific.net/MSF.561-565.531
Citation
K. Zhang, Q. Zhang, P. F. Wang, L. Bai, W. P. Shen, C. C. Ge, "Silicon Nitride/Boron Nitride Composite by Combustion Synthesis", Materials Science Forum, Vols. 561-565, pp. 531-534, 2007
Online since
October 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hua Zhang Zhai, Hong Nian Cai, Xiao Zhan Yang, Jian Bao Li, Gang Feng Guo, Chuan Bao Cao
Abstract:A series of BN-SiO2 composite ceramics with high relative densities have been fabricated by hot pressing of a mixture of hexagonal boron...
1426
Authors: Tao Jiang, Hai Yun Jin, Zhi Hao Jin, Jian Feng Yang, Guan Jun Qiao
Abstract:The machinable B4C/BN ceramics composites were fabricated by hot-pressing sintering process at 1850oC for 1h under the pressure of 30MPa....
53
Authors: Daisuke Horikawa, Junichi Tatami, Toru Wakihara, Katsutoshi Komeya, Takeshi Meguro
Abstract:HfO2-added Si3N4 ceramics are known to exhibit excellent high-temperature strength and excellent damage characteristics because HfO2 assists...
35
Authors: Kai Jin Huang, Li Yan, Hua Min Kou, Chang Sheng Xie
Abstract:Based on the combined toughening principle, pure Al2O3/AlB12/Al composite ceramic powders have been synthesized using a new laser-induction...
596
Authors: You Jun Lu, Hong Fang Shen, Yan Ming Wang
Composites
Abstract:High-temperature mechanical properties, machinability, oxidation resistance and thermal shock resistance of different content of carbon...
276