首页期刊信息编委及顾问期刊发行联系方式使用帮助常见问题ENGLISH
位置:首页 >> 正文
添加剂B2O3对SiC/h-BN复相陶瓷低温烧结行为及性能的影响
作者:翟凤瑞1 2 李双3 谢志鹏4 孙加林1 易中周2 
单位:1. 北京科技大学材料科学与工程学院 北京 100083 2. 红河学院理学院 云南 蒙自 661100  3. 山东理工大学资源与环境工程学院 山东 淄博 255049 4. 清华大学新型陶瓷与精细工艺国家重点实验室 北京 100084 
关键词:六方氮化硼 碳化硅 放电等离子烧结 烧结行为 致密化 力学性能 
分类号:TQ174.75
出版年,卷(期):页码:2016,44(3):0-0
DOI:
摘要:

 以乱层结构h-BN(t-BN)SiC纳米粉体为原料B2O3为烧结助剂,利用放电等离子烧结技术(SPS)制备出SiC/h-BN复相陶瓷。采用X射线衍射和扫描电子显微镜对试样的物相组成和显微结构进行分析,研究烧结助剂含量对SiC/h-BN复相陶瓷的低温烧结行为、致密化、微观结构及力学性能的影响。结果表明利用SPS低温烧结方法,添加少量B2O3添加剂即可有效地提高复相陶瓷的致密度和力学性能。与无添加剂烧结样品相比,烧结助剂的添加降低了样品烧结收缩起始温度,促进样品中片状h-BN晶粒的移动和重排,提高了颗粒间的结合强度。随着烧结助剂添加量的增加,复相陶瓷致密度增加显著,强度和韧性均呈现先增加后降低的趋势,在B2O3添加量为5%时复相陶瓷获得了较佳的相对密度和力学性能,其相对密度、抗弯强度、断裂韧性和弹性模量分别为96.92%274.7 MPa2.91 MPa·m1/2127.2 GPa,但添加过多B2O3,则不利于提高复相陶瓷的力学性能。

doxycycline doxycycline doxycycline
sumatriptan side effects sumatriptan side effects sumatriptan side effects

 SiC/h-BN multiphase ceramics were prepared via spark plasma sintering (SPS) with t-BN and SiC nanopowders as raw materials and B2O3 as a sintering additive. The phase composition and microstructure of specimens were characterized by X-ray diffraction and scanning electronic microscopy. The effect of sintering additive content on the sintering behavior, densification, microstructure and mechanical properties of SiC/h-BN multiphase ceramics was investigated. The results show that the addition of B2O3 can effectively increase the density and mechanical properties at a low sintering temperature. Compared to the samples without B2O3 additive, the B2O3 additive is effective to decrease the initial shrinkage temperature, promote the rearrangement of h-BN flake grains and improve the bonding strength between the grains. The density of multiphase ceramics increases, and the mechanical properties firstly increase and then decrease with the increase of sintering additive content. The relative density and mechanical properties of the sample with 5% B2O3 content are better than those of other samples, and the relative density, flexural strength, fracture toughness and elastic modulus are 96.92%, 274.7 MPa, 2.91 MPa·m1/2 and 127.2 GPa, respectively. However, the excessive addition of B2O3 is not conducive to the improvement of mechanical properties.

基金项目:
作者简介:
abortion las vegas abortion clinics in the bronx abortion pictures
参考文献:

 谢志鹏. 结构陶瓷[M]. 北京: 清华大学出版社, 2011: 458–461. [2] EICHLER J, LESNIAK C. Boron nitride (BN) and BN composites for high-temperature applications[J]. J Eur Ceram Soc, 2008(28): 1105–1109. [3] 李端, 张长瑞, 李斌, 等. 氮化硼透波材料的研究进展与展望[J]. 硅酸盐通报, 2010, 29(5): 1072–1077. LI Duan, ZHANG Changrui, LI Bin, et al. Bull Chin Ceram Soc (in Chinese), 2010, 29(5): 1072–1077.

[4] ZHENG Y T, LI H B, ZHOU T. Microstructure and mechanical properties of h-BN–SiC ceramic composites prepared by in situ combustion synthesis[J]. Mater Sci Eng A, 2012, 540: 102–106. [5] 翟凤瑞, 谢志鹏, 张衡, 等. 放电等离子低温烧结h-BN-SiC复相陶瓷的结构与力学性能[J]. 硅酸盐学报, 2015, 43(6): 765–769. ZHAI Fengrui, XIE Zhipeng, ZHANG Heng, et al. J Chin Ceram Soc, 2015, 43(6): 765–769. [6] 李红伟, 张琴, 金志浩, 等. 等离子活化烧结制备SiC/h-BN复相陶瓷[J]. 硅酸盐学报, 2009, 37(11): 1808–1812.
LI Hongwei, ZHANG Qin, JIN Zhihao, et al. J Chin Ceram Soc, 2009, 37(11): 1808–1812. [7] 杨治华, 贾德昌, 周玉. SiC-BN及Si-B-C-N复合陶瓷的研究进展[J]. 机械工程材料, 2005, 29(3): 7–9. YANG Zhihua, JIA Dechang, ZHOU Yu. Mater Mech Eng (in Chinese), 2005, 29(3): 7–9. [8] 叶乃清, 曾照强, 胡晓清, 等. BN–YAlON复合陶瓷的烧结行为[J]. 硅酸盐学报, 1998, 26(2): 266–268.
YE Naiqing, ZENG Zhaoqiang, HU Xiaoqing, et al. J Chin Ceram Soc, 1998, 26(2): 266–268. [9] 杨治华, 贾德昌, 周玉, 等. 添加剂对原位合成SiC-BN复合陶瓷组织与性能的影响[J]. 稀有金属材料与工程, 2005, 34(z1): 544–546. YANG Zhihua, JIA Dechang, ZHOU Yu, et al. Rare Met Mater Eng (in Chinese), 2005, 34(z1): 544–546. [10] 雷玉成, 包旭东, 刘军, 等. 液相烧结六方氮化硼陶瓷[J]. 江苏大学学报: 自然科学版, 2005, 26(4): 357–360. LEI Yucheng, BAO Xudong, LIU Jun, et al. J Jiangsu Univ:Nat Sci Ed (in Chinese), 2005, 26(4): 357–360. [11] 赵海洋, 王为民, 傅正义, 等. CaF2烧结助剂对热压烧结AlN–BN陶瓷复合材料的影响[J]. 无机材料学报, 2008, 23(1): 99–103.
ZHAO Haiyang, WANG Weimin, FU Zhengyi, et al. J Inorg Mater (in Chinese), 2008, 23(1): 99–103. [12] 雷玉成, 包旭东, 刘军, 等. 六方氮化硼无压烧结研究[J]. 兵器材料科学与工程, 2005, 28(4): 20–23. LEI Yucheng, BAO Xudong, LIU Jun, et al. Ordnance Mater Sci Eng (in Chinese), 2005, 28(4): 20–23. [13] WEI D Q, MENG Q C, JIA D C. Microstructure of hot-pressed h-BN/Si3N4 ceramic composites with Y2O3–Al2O3 sintering additive [J]. Ceram Int, 2007, 33(2): 221–226.
[14] LIU B, YI L, CHEN X M. Effects of B2O3 addition on sintering behavior and microwave dielectric properties of (Sr0.6Ca0.4) LaAlO4 ceramics [J]. Mater Res Bull, 2015, 67: 230–233. [15] LV Y, ZUO R Z. Effect of the B2O3 addition on the sintering behavior and microwave dielectric properties of Ba3(VO4)2-Zn1.87SiO3.87 composite ceramics [J]. Ceram Int, 2013, 39(3): 2545–2550.
[16] 史小红, 李贺军, 邹继兆, 等. 氧化硼含量对C/C复合材料SiC涂层结构和抗氧化性能的影响[J]. 固体火箭技术, 2009, 32(1): 100–102. SHI Xiaohong, LI Hejun, ZOU Jizhao, et al. J Solid Rocket Technol (in Chinese), 2009, 32(1): 100–102.  
服务与反馈:
文章下载】【加入收藏
中国硅酸盐学会《硅酸盐学报》编辑室
京ICP备10016537号-2
京公网安备 11010802024188号
地址:北京市海淀区三里河路11号    邮政编码:100831
电话:010-57811253  57811254    
E-mail:jccs@ceramsoc.com