TiB2颗粒增强反应结合B4C陶瓷的显微结构与性能

doi:10.15541/jim20140688

无机材料学报 ›› 2015, Vol. 30 ›› Issue (6): 667-672.DOI: 10.15541/jim20140688

• • 上一篇

TiB₂颗粒增强反应结合B₄C陶瓷的显微结构与性能

林青青^1,2,3, 董绍明^1,2, 何平^1,2, 周海军^1,2, 胡建宝^1,2

(1. 中国科学院上海硅酸盐研究所, 结构陶瓷与复合材料工程研究中心, 上海200050; 2. 中国科学院上海硅酸盐研究所, 高性能陶瓷和超微结构国家重点实验室, 上海200050; 3. 中国科学院大学, 北京 100049)

收稿日期:2014-12-31 出版日期:2015-02-16 网络出版日期:2015-05-22
作者简介:林青青. E-mail: linqingqing_2006@126.com

Microstructure and Property of TiB₂ Reinforced Reaction-bonded B₄C Composites

LIN Qing-Qing^1,2,3, DONG Shao-Ming^1,2, HE Ping^1,2, ZHOU Hai-Jun^1,2, HU Jian-Bao^1,2

(1. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China)

Received:2014-12-31 Published:2015-02-16 Online:2015-05-22
About author:LIN Qing-Qing(1987– ), female, candidate of master degree. E-mail: linqingqing_2006@126.com
Supported by:
Innovation Project of Shanghai Institute of Ceramics (Y22ZC6160G);National High Technology Research and Development Program (2013AA030703)

摘要/Abstract

摘要：

以微孔碳、颗粒级配碳化硼粉体、钛粉和硅粉为原料, 通过多孔预制体真空熔渗Si工艺制备了硼化钛颗粒增强的反应结合碳化硼复相陶瓷, 并通过X射线衍射、扫描电子显微镜、EDS能谱和透射电子显微镜对复合材料的显微结构进行表征。结果表明: 在预制体中钛为15wt%时, 所制备的复相陶瓷抗弯强度和断裂韧性分别为313 MPa和5.40 MPa•m^1/2。原位反应生成的硼化钛对材料的增韧补强起到了积极的作用。

关键词: 反应烧结碳化硼, 微孔碳, 钛, 硼化钛, 增韧补强

Abstract:

Dense B₄C composites were fabricated by reaction bonding technique based on vacuum infiltration of silicon melt into green preforms made of microporous carbon, B₄C and Ti powders. Phase assemblage and microstructure of the composites were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrum (EDS) and transmission electron microscope (TEM). The flexural strength and fracture toughness of the composite with 15wt% Ti in its preform were 313 MPa and 5.40 MPa•m^1/2, respectively. The in-situ generated TiB₂ played a positive role in strengthening and toughening material.

Key words: reaction bonded boron carbide, microporous carbon, Ti, TiB2, toughening and strengthening

中图分类号:

TB332

林青青, 董绍明, 何平, 周海军, 胡建宝. TiB₂颗粒增强反应结合B₄C陶瓷的显微结构与性能[J]. 无机材料学报, 2015, 30(6): 667-672.

LIN Qing-Qing, DONG Shao-Ming, HE Ping, ZHOU Hai-Jun, HU Jian-Bao. Microstructure and Property of TiB₂ Reinforced Reaction-bonded B₄C Composites[J]. Journal of Inorganic Materials, 2015, 30(6): 667-672.

图/表 8

Table 1 Titanium content in the preforms

Specimen	Ti0	Ti5	Ti10	Ti15	Ti30
Content of Ti in the perform/wt%	0	5	10	15	30

Fig. 1 XRD pattern of reaction bonded B4C composites without Ti addition in the preform

Fig. 2 (a, b) SEM images of composite Ti0, (c, d) EDS spectra of point 1 and 2 in image (b)

Fig. 3 XRD pattern of reaction bonded B4C composites with Ti addition in the performs

Fig. 4 SEM images of reaction bonded B4C composites (a) Ti0; (b) Ti10; (c) Ti15; (d) Ti30

Table 2 Properties of the reaction bonded B4C composites

Specimen	Density/ (g•cm^-3)	Open porosity/ %	Flexural strength/ MPa	Elastic modulus/ GPa	Vickers hardness/ MPa	Fracture toughness/ (MPa•m^1/2)
Ti0	2.52	1.6	286±12	332±11	22640±1950	4.74±0.73
Ti5	2.54	1.1	295±8	338±10	21220±1660	5.10±0.14
Ti10	2.59	0.9	320±10	323±2	21330±950	5.27±0.25
Ti15	2.63	0.6	313±12	332±4	21080±1650	5.40±0.14
Ti30	2.79	1.4	272±9	330±7	15510±700	4.97±0.23

Fig. 5 SEM images showing the propagation behavior of indentation cracks in (a) sample Ti0 and (b) sample Ti15 The arrow in image (b) indicates the occurrence of crack deflection around a TiB2 particle

Fig. 6 SEM images of the fracture surface of (a) sample Ti0 and (b) sample Ti15

参考文献 16

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TiB₂颗粒增强反应结合B₄C陶瓷的显微结构与性能

Microstructure and Property of TiB₂ Reinforced Reaction-bonded B₄C Composites

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