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Molten Salt Synthesis of Magnesium Aluminate (MgAl 2 O 4 ) Spinel on Ti 3 AlC 2 Substrate
Author(s) -
Zhang Jie,
Li Danhua,
Zhou Yanchun
Publication year - 2009
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.1551-2916.2009.02969.x
Subject(s) - spinel , tetragonal crystal system , molten salt , materials science , aluminate , scanning electron microscope , substrate (aquarium) , mineralogy , hydrothermal circulation , layer (electronics) , chemical engineering , magnesium , crystallography , hydrothermal synthesis , crystal structure , metallurgy , composite material , chemistry , geology , oceanography , cement , engineering
A MgAl 2 O 4 (MA) spinel layer was synthesized on Ti 3 AlC 2 substrate through the molten salt synthesis (MSS) method. The Ti 3 AlC 2 substrate was immersed in MgCl 2 ·6H 2 O powders and treated at 800°, 850°, and 900°C for 4 h in air. A continuous and 10‐μm‐thick MgAl 2 O 4 layer was obtained at 900°C, by which the surface hardness of Ti 3 AlC 2 can be effectively improved. The combined scanning electron microscopy observations and crystal morphology simulation further revealed that the as‐formed MgAl 2 O 4 presents tetragonal bipyramids morphology with (400)‐orientation.