Knowledge Management System Of Shanghai Institute of Applied Physics, CAS
| High temperature oxidation of LaB6-ZrB2 eutectic in situ composite | |
| Chen, CM; Zhang, LT; Zhou, WC; Li, MQ（李民乾） | |
| 1999 | |
| Source Publication | ACTA MATERIALIA
 |
| ISSN | 1359-6454 |
| Volume | 47Issue:6Pages:1945 |
| Abstract | LaB6-ZrB2 eutectic in situ composites are interesting candidates for manufacture of turbine blades because of their excellent mechanical properties. The oxidation behavior of LaB6-ZrB2 eutectic in situ composites prepared by electric are melting was studied in a temperature range of 916-1223 degrees C and in a pressure range of 1.5x10(4)-7.2x10(4) Pa. The specific weight change of the LaB6-ZrB2 eutectic obeys the Arrhenius equation below the oxidation temperature of 1094 degrees C and appears to obey a paralinear equation above this temperature. The rate of weight change is described by k(p) = 9.71 x 10(-3) exp(-31000/RT) mg(2)/cm(4) min in the range 916-1094 degrees C. Above 1094 degrees C, rapid oxidation kinetics were observed, La2O3. B2O3 and La2O3. 3B(2)O(3) being the primary scale constituent with ZrO2 deficiency in the outer scale. The oxidation increases with P-O2 up to 3.9 x 10(4) Pa, above which the trend is reversed due to the active oxidation of ZrB2. The oxidation appears to be controlled by oxygen diffusion through the scale and the oxidized layers consist mainly of La2O . B2O3, La2O3. 3B(2)O(3) and trace of ZrO2. (C) 1999 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved. |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 应物所项目组 |
| WOS ID | WOS:000080268900023 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/9991 |
| Collection | 中科院上海原子核所2003年前 |
| Recommended Citation GB/T 7714 | Chen, CM,Zhang, LT,Zhou, WC,et al. High temperature oxidation of LaB6-ZrB2 eutectic in situ composite[J]. ACTA MATERIALIA,1999,47(6):1945. |
| APA | Chen, CM,Zhang, LT,Zhou, WC,&Li, MQ.(1999).High temperature oxidation of LaB6-ZrB2 eutectic in situ composite.ACTA MATERIALIA,47(6),1945. |
| MLA | Chen, CM,et al."High temperature oxidation of LaB6-ZrB2 eutectic in situ composite".ACTA MATERIALIA 47.6(1999):1945. |
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