Received date: 2012-06-19
Revised date: 2012-09-18
Online published: 2012-12-11
Supported by
Supported by National Natural Science Foundation of China (Nos.50801037, 51071082 and 51271090), Program for Changjiang Scholars and Innovative Research Team in University (No.IRT0730), New Century Excellent Talents in University (No.NCET–10–0184) and Specialized Research Fund for the Doctoral Program of Higher Education (No.20103601110001)
A growing trend to use new oxide dispersion strengthened (ODS) copper–based composites is observed recently world–wide. Yttria (Y2O3 ) and most rare earth oxides are potentially attractive as dispersiods for copper–based composites owing to their thermodynamic stability. Cu–0.9Y2O3 (volume fraction, %) composites were prepared with Cu–0.4Y (mass fraction, %) alloy by in situ reaction at liquidus temperature. The objective of the work was to investigatechanges in structure and strengthening mechanism of Cu–Y2O3 composites. TEM observation and SAD analysis of the composites indicate that the obtained Y2O3 nano–particles are uniformly distributed in copper matrix, their mean size and space between particles are 5.0 nm and 20 nm, respectively, and the cubic Y2O3 phase is coherent with copper matrix, which indicated (422)Y2O3//(111)Cu and [011]Y2O3//[112]Cu orientation relationship. The strengthening mechanism of the composites is analyzed and explained in three aspects: matrix strengthening, fine particles strengthening according to the Orowan model and shear model. The tensile strength of Cu–0.9Y2O3 composites is 568 MPa, which is strengthened by both Orowan mechanism and shear mechanism, the strength value added by Orowan mechanism and shear mechanism can be calculated to be 185 and 195 MPa, respectively.
ZHUO Haiou TANG Jiancheng YE Nan . Cu–Y2O3 COMPOSITES PREPARED BY LIQUID PHASE IN SITU REACTION[J]. Acta Metall Sin, 2012 , 48(12) : 1474 -1478 . DOI: 10.3724/SP.J.1037.2012.00362
[1] Zhang S L, Yin Z M. Mater Rev, 2003; 17: 26
(张生龙, 尹志民. 材料导报, 2003; 17: 26)
[2] Li Z Y, Shen J, Cao F Y, Li Q C. J Mater Process Technol, 2003; 35: 60
[3] Liu P, Kang B X, Cao X G, Hang J L, Gu H C. Acta Metall Sin, 1999; 35: 561
(刘平, 康布熙, 曹兴国, 黄金亮, 顾海澄. 金属学报, 1999; 35: 561)
[4] Li Q, Ma B, Li L, Hang G J, Chen C L, Xie S S. Rare Met Mater Eng, 2011; 40(suppl): 132
(李 强, 马彪, 李雷, 黄国杰, 陈春玲, 谢水生. 稀有金属材料与工程, 2011; 40(增刊): 132)
[5] Yan P, Lin C G, Cui S, Lu Y J, Zhou Z L, Li Z D. J Wuhan Univ Technol, 2011; 26: 902
[6] Shen Y T, Cui C X, Meng F B, Wu R J. Acta Metall Sin, 1999; 35: 888
(申玉田, 崔春翔, 孟凡斌, 吴人洁. 金属学报, 1999; 35: 888)
[7] Tian B H, Liu P, Song K X, Li Y, Liu Y, Ren F Z, Su J H. Mater Sci Eng, 2006; A435–436: 750
[8] Nagorka M S, Levi C G, Lucas G E, Ridder S D. Mater Sci Eng, 1991; A142: 277
[9] Chakrabarti D J, Laughlin D E. In: Massalski T B ed., Binary Alloy Phase Diagrams. Ohio: American Society for Metals, 1986: 977
[10] Engels J M, Gasgnier M, Blaise G. J Alloys Compd, 1998; 267: 294
[11] Hu H Q. Metal Solidification Principle. Beijing: China Machine Press, 1981: 110
(胡汉起 著. 金属凝固原理. 北京: 机械工业出版社, 1981: 110)
[12] Ribis J, Carlan Y. Acta Mater, 2012; 60: 238
[13] Ribis J, Lozano–Perez S. Mater Lett, 2012; 74: 143
[14] Hirsch P, Howie A, Nicholson R B, Pashley D W. Translated by Liu A S, Li Y H. Electron Microscopy of Thin Crystals. Beijing: Science Press, 1983: 355
/
| 〈 |
|
〉 |
