| 방전플라즈마소결법으로 제조된 $ZrB_2$-ZrC 복합체의 결정립 방위분포 및 결정입계의 특성 |
| 심승환, 김경훈, 심광보 |
| 한양대학교 세라믹공학과 |
| Characteristics of Grain Orientation and Grain Boundaries of the $ZrB_2$-ZrC Composites Densified by Spark Plasma Sintering |
| Seung-Hwan Shim, Kyoung-Hun Kim, Kwang-Bo Shim |
| Department of Ceramic Engineering, CPRC, Hanyang University |
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| ABSTRACT |
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The grain orientation distribution and grain boundary characterization of $ZrB_2$-ZrC composites sintered by a SPS(Spark Plasma Sintering) method, a new sintering technique were analyzed by the EBSP technique and then their crystallographic results have been compared with those of a sintered specimen using a PLS(Pressureless Sintering) method. In the $ZrB_2$-ZrC composite manufactured by SPS, (0001) planes of $ZrB_2$ were oriented in the direction normal to the specimen surface. In the case of PLS, those of $ZrB_2$ were oriented normal to the electron beam. In both cases of PLS and SPS, ZrC grains had the randomly oriented grain structure. The grain boundary characterization showed that low angle grain boundaries in the PLS and SPS processed materials constituted about 10% and 8% of the total number of boundaries, respectively, represented the only slight difference between the proportion of low angle grain boundary. However, in the distribution of CSL(Coincident Site Lattice) boundaries, it was shown the higher proportion of CSL boundaries with $Sigma$ 3,5,7,9, 11 in the SPS processed material. |
| Key words:
Spark plasma sintering, EBSP, $ZrB_2$-ZrC composite, Grain orientation, Coincident site lattice |
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