hBN含量对Si3N4-hBN复相陶瓷性能和微观结构的影响

doi:10.15541/jim20160425

Journal of Inorganic Materials ›› 2017, Vol. 32 ›› Issue (5): 509-516.doi: 10.15541/jim20160425

• Orginal Article • Previous Articles Next Articles

Effect of hBN Content on Property and Microstructure of Si₃N₄-hBN Composite Ceramics

Chang-Song ZHANG(), Qiang LIU, Wei CHEN

College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China

Received:2016-07-18 Revised:2016-10-03 Online:2017-05-20 Published:2017-05-02
Supported by:
National Natural Science Foundation of China(51405278);Shaanxi University of Science and Technology Scientific Research Foundation to introduce Dr (BJ11-01);Shaanxi province natural science foundation research project(2015JM5242);Open Research Subject of Key Laboratory of Special Material and Preparation Technology of Institutes in Sichuan Higher Education (szjj2015-088)

Abstract

Abstract:

Si₃N₄-hBN composites were prepared using hot-press method with nano-scaled powder, the influence of hBN content on density, mechanical properties, tribological properties, microstructure of Si₃N₄-hBN composites were investigated. The density and mechanical properties of composites were measured by Archimedes method, three point bending method and Vickers indentation method. The tribological properties of composites were measured by friction and wear tester. The phase composition and microstructure of composites were analyzed and observed by XRD, EDAX and SEM, LSCM. The results showed that with increase of hBN content the composites’ density gradually decreased, the composites’ porosity increased at first and then stable gradually, the composites’ mechanical performance gradually decreased. The friction tests indicated that the tribological properties of Si₃N₄-hBN and GCr15, with pair under dry friction, increased at first and then decreased sharply with the increase of hBN content. The friction coefficient and wear coefficient decreased gradually when hBN content was less than 20%, and then increased sharply when the hBN content was more than 20%. The friction coefficient reaches the lowest value of 0.31 when the hBN content was about 20%. The addition of hBN influenced the mechanical and tribological properties of Si₃N₄-hBN composites through directly influenced its microstructure.

Key words: Si3N4-hBN, density, mechanical properties, microstructure, tribological properties

CLC Number:

TQ174

Chang-Song ZHANG, Qiang LIU, Wei CHEN. Effect of hBN Content on Property and Microstructure of Si₃N₄-hBN Composite Ceramics[J].Journal of Inorganic Materials, 2017, 32(5): 509-516.

Figures/Tables 13

Table 1

Fig. 1

Table 2

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Fig. 9

Fig. 10

Fig. 11

References 20

[1]	RILEY F L.Silicon nitride and related materials.Journal of the American Ceramic Society, 2000, 83(2): 245-265.
[2]	ZIEGLER A, IDROBO J C, CINIBYLK M K, et al.Interface structure and atomic bonding characteristics in sicon nitride ceramics.Science, 2004, 306(3): 1768-1770.
[3]	ZHU C J, JIANG J, GAO L, et al.The fabrication and progress of silicon nitride ceramics.Jiangsu Ceramics, 2001, 34(3): 10-12.
[4]	ZHANG W R.Current status and progress of Si3N4-SiCp multiphase ceramic.Hebei Ceramic, 1995, 23(03): 21-24.
[5]	PETZOW G, HERRMANN M.Silicon Nitride Ceramics: Structure & Bonding. Berlin Heidelberg: Springer-Verlag, 2002, 102: 47-167.
[6]	周玉. 陶瓷材料学. 北京: 科学出版社, 2004.
[7]	李世普. 特种陶瓷工艺学. 武汉: 武汉理工大学, 2008.
[8]	ZHANG G J, ZOU J, NI D W, et al.Boride ceramics: densification, microstructure tailoring and properties improvement.Journal of Inorganic Materials, 2012, 27(3): 225-233.
[9]	DUAN X M, YANG Z, CHEN L, et al.Review on the properties of hexagonal boron nitride matrix composite ceramics.Journal of the European Ceramic Society, 2016, 36(15): 3725-3737.
[10]	SUN Y, MENG Q C, JIA D C, et al.Effect of hexagonal BN on the microstructure and mechanical properties of Si3N4 ceramics.Journal of Materials Processing Technology, 2007, 182(1): 134-138.
	CHO M W, KIM D W, CHO W S.Analysis of micromachining characteristics of Si3N4-hBN composites.Journal of the Europ- ean Ceramic Society, 2007, 27(2): 1259-1265.
[11]	WEI D Q, MENG Q C, JIA D C.Microstructure of hot pressed hBN-Si3N4 ceramic composites with Y2O3-Al2O3 sintering additive.Ceramics International, 2007, 33(2): 221-226.
[12]	WANG R G, PAN W, JIANG M N, et al.Investigation of the physical and mechanical properties of hot-pressed machinable Si3N4-hBN composites and FGM.Materials Science and Engineering: B, 2002, 90(3): 261-268.
[13]	ZOU J, ZHANG G J, SHEN Z J, et al.Ultra-low temperature reactive spark plasma sintering of ZrB2-hBN ceramics.Journal of the European Ceramic Society, 2016, 36(15): 3637-3645.
[14]	ZOU J, LIU J, ZHANG G J, et al.Hexagonal BN-encapsulated ZrB2 particle by nitride boronizing.Acta Materialia, 2014, 72(15): 167-177.
[15]	GAO L, JIN X, LI J, et al.BN/Si3N4 nanocomposite with high strength and good machinability.Materials Science and Engineering: A, 2006, 415(1): 145-148.
[16]	SKOPP A, WOYDT M.Ceramic and ceramic composite materials with improved friction and wear properties.Tribology transactions, 1995, 38(2): 233-242.
[17]	CARRAPICHANO J M, GOMES J R, SILVA R F.Tribological behaviour of Si3N4-BN ceramic materials for dry sliding applications.Wear, 2002, 253(9): 1070-1076.
[18]	CHEN W, GAO Y M, CHEN C.Tribological behavior of Si3N4-hBN ceramic materials against stainless steel under dry friction condition.Tribology, 2010, 30(3): 243.
[19]	LIZUKA T, KITA H, HIRAI T, et al.Tribological behavior of W2C nano-particle reinforced Si3N4 matrix composite.Wear, 2004, 257(9): 953-961.
[20]	YUAN L J, YAN D S, MAO Z Q.Mechanism and knetics of sintering of hot-pressed silicon nitride at lower temperatures.Journal of the Chinese Ceramic Society, 1989, 17(6): 530-536.

Number	HBN/ wt%	Density /(g·cm^-3)	Relative density /%	Porosity /%	Bending strength /MPa	Vickers hardness /GPa	Fracture toughness /(MPa·m^1/2)
SN0	0	3.20	97.0	0.24	818	14.9	7.36
SN5	5	3.12	96.7	0.55	764	13.3	6.67
SN10	10	3.04	96.4	0.80	717	12.4	6.58
SN20	20	2.89	96.0	1.02	695	8.9	6. 39
SN30	30	2.79	91.2	1.08	577	6.6	5.98

Analysis area	Elements /at%
Analysis area	Si	N	O	Al	Y
“1” area	39.72	52.91	5.36	1.57	0.42

Effect of hBN Content on Property and Microstructure of Si₃N₄-hBN Composite Ceramics

RichHTML

PDF (PC)

Like