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Two-step preparation of AlON transparent ceramics with powder synthesized by aluminothermic reduction and nitridation method
Y. Wang; X. M. Xie; J. Q. Qi; J. Wang; D. Wu; X. F. Guo; N. Wei; T. C. Lu
2014
Source PublicationJournal of Materials Research
ISSN0884-2914
Volume29Issue:19Pages:2325-2331
AbstractThe aluminothermic reduction and nitridation method using microsized Al powder and nanosized alumina powder was employed to fabricate AlON powder under N-2 atmosphere. Single-phase aluminum oxynitride (AlON) can be prepared at a relatively low temperature (1700 degrees C) with a holding time of 3 h. The powder is ball milled, doped with different amounts of Y2O3 (0.1-0.9 wt%) as a sintering additive, and then shaped into pellets. The pellet sintering is carried out at two relatively low temperatures (1860 and 1880 degrees C) for 10 h. The transmittance and hardness of the obtained samples varies as the amount of Y2O3 varies. The sample sintered under optimal conditions can reach an ultimate transmittance of 65% with 2 mm thickness. The Vickers hardness of highly transparent AlON ceramic is about 15.95 +/- 0.17 GPa, indicating that our method has a promising future in transparent AlON ceramic production. The sintering promoting mechanisms of Y2O3 are also discussed in detail.
description.department[wang, ying ; xie, xiumin ; qi, jianqi ; wei, nian ; lu, tiecheng] sichuan univ, coll phys sci & technol, chengdu 610064, sichuan, peoples r china. [wang, ying ; qi, jianqi ; wei, nian] sichuan univ, key lab high energy dens phys, minist educ, chengdu 610064, sichuan, peoples r china. [xie, xiumin] sichuan univ, key lab radiat phys & technol, minist educ, chengdu 610064, sichuan, peoples r china. [wang, jun] sichuan univ sci & engn, sch sci, zigong 643000, sichuan, peoples r china. [wu, di ; guo, xiaofeng] univ calif davis, peter a rock thermochem lab, davis, ca 95616 usa. [wu, di ; guo, xiaofeng] univ calif davis, neat oru, davis, ca 95616 usa. [lu, tiecheng] chinese acad sci, int ctr mat phys, shenyang 110015, liaoning, peoples r china. ; qi, jq (reprint author), sichuan univ, coll phys sci & technol, chengdu 610064, sichuan, peoples r china. ; qijianqi@scu.edu.cn ; lutiecheng@vip.sina.com
KeywordAluminum Oxynitride Carbothermal Reduction Sintering Behavior Phase Reaction Thermodynamics Parameters System Model Aln
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73431
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Y. Wang,X. M. Xie,J. Q. Qi,et al. Two-step preparation of AlON transparent ceramics with powder synthesized by aluminothermic reduction and nitridation method[J]. Journal of Materials Research,2014,29(19):2325-2331.
APA Y. Wang.,X. M. Xie.,J. Q. Qi.,J. Wang.,D. Wu.,...&T. C. Lu.(2014).Two-step preparation of AlON transparent ceramics with powder synthesized by aluminothermic reduction and nitridation method.Journal of Materials Research,29(19),2325-2331.
MLA Y. Wang,et al."Two-step preparation of AlON transparent ceramics with powder synthesized by aluminothermic reduction and nitridation method".Journal of Materials Research 29.19(2014):2325-2331.
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