caa a22 4500 388021683 CHVBK 20180307124926.0 cr unu---uuuuu 161130e199807 xx s 000 0 eng 10.1557/JMR.1998.0244 doi S0884291400044800 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0244 Aluminum borate in the combustion synthesis of alumina/boride composite [Elektronische Daten] The formation mechanism of aluminum borate in the combustion synthesis of Al2O3/B4C composite with Al, B2O3, and C as starting materials is proposed. Based on the formation mechanism, several approaches taken to eliminate them are discussed. The unconverted B2O3 is the major cause of the formation of 9Al2O3 · 2B2O3 when the reaction proceeds in the SHS mode. The amount of 9Al2O3 · 2B2O3 formed is very sensitive to the excess B2O3 to the stoichiometry 4Al + 2B2O3 + C and influenced by the size of B2O3 powder. The high dispersion of the reactants is helpful in prompting the thermite reaction to consume B2O3 and hence inhibiting the aluminum borate formation. Copyright © Materials Research Society 1998 Liu Yonghe P/M Group, School of Materials Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China Yin Sheng P/M Group, School of Materials Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China Guo Zhimeng P/M Group, School of Materials Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China Hoyi Lai P/M Group, School of Materials Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China Journal of Materials Research Cambridge University Press 13/7(1998-07), 1749-1752 0884-2914 13:7<1749 1998 13 JMR https://doi.org/10.1557/JMR.1998.0244 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0244 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Yonghe P/M Group, School of Materials Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China NATIONALLICENCE 700 1- Yin Sheng P/M Group, School of Materials Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China NATIONALLICENCE 700 1- Guo Zhimeng P/M Group, School of Materials Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China NATIONALLICENCE 700 1- Hoyi Lai P/M Group, School of Materials Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/7(1998-07), 1749-1752 0884-2914 13:7<1749 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge