Paper Titles
Barium Titanate Nanopowders Prepared from the Modified Oxalate Co-Precipitation Method
p.515
Fabrication of Bi2-xSbxTe3 (x=0-1.5) Thick Film by Centrifugal Deposition
p.519
Synthesis of Ultra-Fine and High-Pure Zirconium Diboride Powders Using Solution-Based Processing
p.523
Simultaneous Synthesis and Consolidation of W-Added ZrB2 by Pulsed Electric Current Pressure Sintering and their Mechanical Properties
p.527
Silicon Nitride/Boron Nitride Composite by Combustion Synthesis
p.531
Grain Growth Behavior of Al2O3-ZrO2 with a Small Amount of Zirconia
p.535
Design of Mold Materials for Encapsulating Semiconductors Using Epoxy Molding Compounds
p.539
Fabrication Processes and Properties of Highly Pure MgAlON Materials
p.543
Development of Efficient Metal Catalyst Support
p.547

Silicon Nitride/Boron Nitride Composite by Combustion Synthesis

Article Preview

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.

You might also be interested in these eBooks
PRICM 6 View Preview

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

531-534

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.531

Citation:

Cite this paper

Online since:

October 2007

Authors:

Ke Zhang, Qiang Zhang, Peng Fei Wang, Ling Bai, Wei Ping Shen, Chang Chun Ge

Keywords:

Boron Nitride, Combustion Synthesis (CS), Composite, Machinability

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2007 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] JIN Haiyun, QIAO Guanjun, GAO Jiqiang, et al. Bull Chin Ceram Soc (in Chinese), 2005, 4: 66-71.

Google Scholar

[2] ZHANG Weiyi, GAO Hong. J Synth Crys (in Chinese), 2005, 34(1): 169-173.

Google Scholar

[3] FENG Caimei, WANG Weimin, FU Zhengyi. J Wuhan Univ Technol (in Chinese), 2004, 26(5) 35-37.

Google Scholar

[4] LIU Zhifeng, QIU Shipeng, LIU Jiachen. Adv Ceram, 2002, 92(1): 20-24 (in Chinese).

Google Scholar

[5] WANG Ruigang, PAN Wei, CHEN Jian, et al. Fabrication and characterization of machinable Si3N4/h-BN functionally graded materials. Mater Res Bull, 2002, 37: 1269-1277.

DOI: 10.1016/s0025-5408(02)00773-0

Google Scholar

[6] WANG Xiangdong, QIAO Guanjun, JIN Zhihao. Rare Metal Mater Eng, 2003, 32(7): 498-502 (in Chinese).

Google Scholar

[7] CHIHIRO KAWAI, AKIRA YAMAKAWA. Effect of porosity and microstructure on the strength of Si3N4: designed microstructure for high strength, high thermal shock resistance, and facile machining. J Am Ceram Soc, 1997, 80(10): 2705-2708.

DOI: 10.1111/j.1151-2916.1997.tb03179.x

Google Scholar

[8] WANG Ruigang, PAN Wei, CHEN Jian, et al. Graded machinable Si3N4/h-BN and Al2O3/LaPO4 ceramic composites. Mater Desi, 2002, 23: 565-570.

DOI: 10.1016/s0261-3069(02)00021-3

Google Scholar