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Modification of Al Particle Surfaces by γ‐Al 2 O 3 and Its Effect on the Corrosion Behavior of Al
Author(s) -
Deng ZhenYan,
Liu YuFu,
Tanaka Yoshihisa,
Ye Jinhua,
Sakka Yoshio
Publication year - 2005
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.1551-2916.2005.00154.x
Subject(s) - materials science , particle (ecology) , metal , sintering , oxide , corrosion , hydrogen , phase (matter) , aluminium oxide , surface modification , metallurgy , chemical engineering , particle size , mineralogy , chemistry , oceanography , organic chemistry , engineering , geology
Metal Al particle surfaces were modified by fine γ‐Al 2 O 3 grains using a mixture of Al and Al(OH) 3 powders, which was pressureless sintered at a temperature of 600°C in vacuum. All the constituents on original Al particle surfaces were transformed into γ‐Al 2 O 3 phase after sintering. No dense passive oxide layers on Al particle surfaces were formed even after the modified Al particles were exposed to oxidation environment. The modified Al particles could continuously react with pure water and generate hydrogen at room temperature. The present finding implies that metal Al could become hydrogen‐generation material by surface modification.