EBSD Analysis for Orientation Relationship of Textured ZrB2-SiC Ultra-high Temperature Ceramics

doi:10.15541/jim20170210

Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (4): 380-384.DOI: 10.15541/jim20170210

Special Issue: 陶瓷基复合材料

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EBSD Analysis for Orientation Relationship of Textured ZrB₂-SiC Ultra-high Temperature Ceramics

ZHENG Hai-Ya¹, MENG Chen-Xi¹, HU Dong-Li¹, GU Hui¹, LIU Hai-Tao¹, ZHANG Guo-Jun^1,3

1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;
2. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
3. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Research Institute of Functional Materials, Donghua University, Shanghai 201620, China

Received:2017-04-28 Revised:2017-05-31 Published:2018-04-30 Online:2018-03-27
About author:ZHENG Hai-Ya. E-mail: zhenghaiya99@163.com
Supported by:
National Natural Science Foundation of China (51532006)

Abstract

Abstract:

Textured ZrB₂-ZrC ceramics sintered by spark plasma sintering were analyzed. The results obtained by SEM and EDS demonstrate the formation of an amount of resultant ZrC phase and trace level of ZrO₂ and BN phases, due to the various reactions between starting powders and impurities. Compared with conventional methods in which TEM was used to analyze the orientation relationship between the phase and the primary phase, EBSD method in SEM can not only study the orientation relationship, but also study a large number of phase boundaries simultaneously to obtain statistical results, so as to avoid artificial selectivity. By using this method, three orientation relationships that may exist between ZrB₂ and ZrC phases, i.e. (011¯0)||(111)&[21¯1¯0]||[101¯], (112¯0)||(2¯02)&[0001]||[111], and (1¯21¯0)|| (2 2¯0)&[0001]||[110] were checked. It is determined that there is no specific orientation relationship between the two phases in this study, inferring that the ZrC phase formed with a homogeneous nucleation mode rather than an epitaxial nucleation.

Key words: textured ultra-high temperature ceramic, scanning electron microscope, EBSD, orientation relation

CLC Number:

TQ174

ZHENG Hai-Ya, MENG Chen-Xi, HU Dong-Li, GU Hui, LIU Hai-Tao, ZHANG Guo-Jun. EBSD Analysis for Orientation Relationship of Textured ZrB₂-SiC Ultra-high Temperature Ceramics[J]. Journal of Inorganic Materials, 2018, 33(4): 380-384.

Figures/Tables 5

Fig. 1 SEM images of the polished surface for ZS0 (a), ZS10 (b) and ZS20 (c) samples and EDS spectra for different phases formed in the ceramics (d)

Fig. 2 Atomic illustration of orientation relationship of ZrB2 and ZrC in plane pair and orientation pair

Table 1 Mismatch of plane pair and orientation pair between ZrB2 and ZrC phases

	Mismatch/%
	Plane	Orientation
(011¯0)\|\|(111)	1.27
[21¯1¯0]\|\|[101¯]		4.50
(112¯0)\|\|(2¯02)	4.50
[0001]\|\|[111]		13.10
(1¯21¯0)\|\|( 2¯20)	4.50
[0001]\|\|[110]		6.40

Fig. 3 Statistics of misorientation in plane pair and orientation pair

Fig. 4 Relationships of plane pair and orientation pair in ZS10 sample

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EBSD Analysis for Orientation Relationship of Textured ZrB₂-SiC Ultra-high Temperature Ceramics

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