Premium
Rapid Densification of Nano‐Grained Alumina by High Temperature and Pressure with a Very High Heating Rate
Author(s) -
Meng Fancheng,
Fu Zhengyi,
Zhang Jinyong,
Wang Hao,
Wang Weimin,
Wang Yucheng,
Zhang Qingjie
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01599.x
Subject(s) - materials science , combustion , microstructure , nano , raw material , high pressure , composite material , chemical engineering , chemistry , thermodynamics , engineering , physics , organic chemistry
A novel method for producing full‐dense nano‐grained alumina was reported. The heat generated by the combustion reaction (or self‐propagating high‐temperature synthesis (SHS)) was applied to act as a heating source. An alumina compact was loaded inside the combustion reactants. After reaction, the temperature of the alumina compact was increased at a heating rate of 1600°C/min. A large mechanical pressure was applied, when the temperature reached the maximum. Two kinds of α‐Al 2 O 3 powders (200 and 600 nm) were used as the raw materials. The rapid densification process was performed within 2 min. Microstructure analysis indicated that the grains had no significant growth.