全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

BaNb2O6/Al2O3复相陶瓷的制备及力学性能

Full-Text   Cite this paper   Add to My Lib

Abstract:

为研究功能材料对结构陶瓷微观结构和力学性能的影响,将铁电相BaNb2O6引入到Al2O3陶瓷中,分别采用无压和热压烧结技术于1350℃制备BaNb2O6/Al2O3复相陶瓷,对其物相组成、微观结构和力学性能进行了研究。结果表明BaNb2O6与Al2O3经过高温烧结能够稳定共存,BaNb2O6的加入促进了Al2O3陶瓷的烧结。BaNb2O6加入量为10%(体积分数)时,1350℃无压烧结和热压烧结制备的BaNb2O6/Al2O3复相陶瓷的致密度、抗弯强度和断裂韧性分别为94.6%、214MPa、2.28MPa?m1/2和99.3%、332MPa、3.55MPa?m1/2。当裂纹扩展遇到BaNb2O6晶粒时发生穿晶断裂,但在晶粒内部出现裂纹偏转,说明铁电相BaNb2O6晶粒内部的微观结构有助于陶瓷的强韧化。

References

[1]  ? ZHU T, YANG W. Toughness variation of ferroelectrics by polarization switch under non-uniform electric field [J]. Acta Mater, 1997, 45(11): 4695–4702.
[2]  ? 郭兴梅, 赵琰, 孙康宁. 压电陶瓷颗粒增韧陶瓷基复合材料研究进展[J]. 硅酸盐通报, 2009, 28(4): 736–750.
[3]  GUO Xingmei, ZHAO Yan, SUN Kangning. Bull Chin Ceram Soc (in Chinese), 2009, 28(4): 736–750.
[4]  ? CHEN X M, YANG B. A new approch for toughening of ceramics [J]. Mater Lett, 1997(33): 237–240.
[5]  ? 刘艳改, 周玉, 贾德昌. 压电陶瓷颗粒对结构陶瓷力学性能影响规律及机理的初步探讨[J]. 陶瓷学报, 2002, 23(1): 17–21.
[6]  LIU Yangai, ZHOU Yu, JIA Dechang. J Ceram (in Chinese), 2002, 23(1): 17–21.
[7]  ? SIRIRAT R, YUKIOM, YOSHIHARU M. Effect of polarization on fracture toughness of BaTiO3/Al2O3 composites [J]. J Eur Ceram Soc, 2004, 24(5): 775–783.
[8]  ? LI J Y, DAI H, ZHONG X H, et al. Lanthanum zirconate ceramic toughened by BaTiO3 secondary phase [J]. J Alloy Compd, 2008, 452(2): 406–409.
[9]  ? LIU Y G, JIA D C, ZHOU Y. Microstructure and mechanical properties of a lithium tantalite dispersed-alumina ceramic composite [J]. Ceram Int, 2002(9): 111–114.
[10]  ? MAO S X, LI X P, HAN X L. Toughening of ferroelectric ceramics under polarization switching [J]. Mater Sci Eng, 2000, A292: 66–73.
[11]  ? RUAN X P, DANFORTH S C, SAFARI A. A theoretical study of the coupling effects in piezoelectric ceramics [J]. Int J Solids Struct, 1999, 36: 465–487.
[12]  ? LIU Y G, ZHOU Y, JIA D C, et al. Polarization toughening of LiTaO3 particles dispersed Al2O3 ceramic composite [J]. Ceram Int, 2005, 31: 81–83.
[13]  ? LIU Y G, ZHOU Y, JIA D C, et al. Domain switching toughening in a LiTaO3 dispersed Al2O3 ceramic composite [J]. Scr Mater, 2002, 47(1): 63–68.
[14]  ? EVANSA G. Perspective on the development of high-toughness ceramics [J]. J Am Ceram Soc, 1990, 73(2): 187–206.
[15]  ? WAHIR P, HSCHNER B. Fracture behavior of composites based on Al2O3–TiC [J]. J Mater Sci, 1980(15): 875–885.
[16]  ? 刘艳改, 贾德昌, 周玉. 烧结方法对LiTaO3/Al2O3复相陶瓷微观组织及力学性能的影响[J]. 材料科学与工艺, 2001, 9(3): 232–235.
[17]  LIU Y G, JIA D C, ZHOU Y. Mater Sci Technol (in Chinese), 2001, 9(3): 232–235.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133