CAS OpenIR  > 中科院上海原子核所2003年前
High temperature oxidation of LaB6-ZrB2 eutectic in situ composite
Chen, CM; Zhang, LT; Zhou, WC; Li, MQ(李民乾)
1999
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume47Issue:6Pages:1945
AbstractLaB6-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 BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000080268900023
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://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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