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ÌâÄ¿£ºDissolution-precipitation mechanism of combustion synthesis of calcium aluminate ×÷ÕߣºShoulei Yanga,b, Guoqing Xiaoa,⁎, Donghai Dinga, Yun Rena, Lihua Lva, Pan Yanga a College of Materials and Mineral Resources, Xi¡äan University of Architecture and Technology, Xi¡äan 710055, China b School of Engineering Management and Real Estate, Henan University of Economics and Law, Zhengzhou 450046, China ÆÚ¿¯£ºCeramics International£¬Volume 43, Issue 17, 1 December 2017, Pages 15918-15926£¬https://dx.doi.org/10.1016/j.ceramint.2017.08.167 |
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Dissolution-precipitation mechanism of combustion synthesis of calcium aluminate ×÷Õß:Yang, SL (Yang, Shoulei)[ 1,2 ] ; Xiao, GQ (Xiao, Guoqing)[ 1 ] ; Ding, DH (Ding, Donghai)[ 1 ] ; Ren, Y (Ren, Yun)[ 1 ] ; Lv, LH (Lv, Lihua)[ 1 ] ; Yang, P (Yang, Pan)[ 1 ] CERAMICS INTERNATIONAL ¾í: 43 ÆÚ: 17 Ò³: 15918-15926 DOI: 10.1016/j.ceramint.2017.08.167 ³ö°æÄê: DEC 1 2017 ²é¿´ÆÚ¿¯Ó°Ïì ÕªÒª The mechanism of combustion synthesis (CS) for calcium aluminate was analyzed by a combustion front quenching method. The phase compositions of different zones in the quenched sample were examined by X-ray diffraction (XRD). The microstructural evolution during the CS process was explored by field-emission scanning electron microscopy equipped with energy dispersive spectrometer (FESEM-EDS). Moreover, the combustion temperature and wave velocity were measured. The results showed that the combustion reaction started with the decomposition of CaO2 and melting of Al, at the same time, O-2 reacted with Al forming Al2O3, which released a large amount of heat to fuse CaO and Al2O3 forming the liquid. Finally, calcium aluminates with good crystallinity would be gradually precipitated from the CaO-Al2O3 liquid. Furthermore, a model corresponding to the dissolution-precipitation mechanism was proposed. ¹Ø¼ü´Ê ×÷Õ߹ؼü´Ê:Calcium aluminate; Combustion synthesis; Mechanism; Combustion front quenching method KeyWords Plus:HIGH-TEMPERATURE-SYNTHESIS; METAL-MATRIX COMPOSITES; SHS; POWDERS; CAAL2O4; WHISKERS; SIZE ×÷ÕßÐÅÏ¢ ͨѶ×÷ÕßµØÖ·: Xiao, GQ (ͨѶ×÷Õß) Xian Univ Architecture & Technol, Coll Mat & Mineral Resources, Xian 710055, Shaanxi, Peoples R China. µØÖ·: [ 1 ] Xian Univ Architecture & Technol, Coll Mat & Mineral Resources, Xian 710055, Shaanxi, Peoples R China [ 2 ] Henan Univ Econ & Law, Sch Engn Management & Real Estate, Zhengzhou 450046, Henan, Peoples R China µç×ÓÓʼþµØÖ·:xiaoguoqing@xauat.edu.cn »ù½ð×ÊÖúÖÂл »ù½ð×ÊÖú»ú¹¹ ÊÚȨºÅ National Natural Science Foundation of China 51272203 51572212 China Postdoctoral Science Foundation 2016M602940XB Open Project from State Key Laboratory of Advanced Refractories 201504 ²é¿´»ù½ð×ÊÖúÐÅÏ¢ ³ö°æÉÌ ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND Àà±ð / ·ÖÀà Ñо¿·½Ïò:Materials Science Web of Science Àà±ð:Materials Science, Ceramics ÎÄÏ×ÐÅÏ¢ ÎÄÏ×ÀàÐÍ:Article ÓïÖÖ:English Èë²ØºÅ: WOS:000413175300185 ISSN: 0272-8842 eISSN: 1873-3956 ÆäËûÐÅÏ¢ IDS ºÅ: FK0NA Web of Science ºËÐĺϼ¯ÖÐµÄ "ÒýÓõIJο¼ÎÄÏ×": 42 Web of Science ºËÐĺϼ¯ÖÐµÄ "±»ÒýƵ´Î": 0 |
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