【摘 要】
：
The kinetics of internal oxidation of dilute Cu-Al alloys, containing 0. 447 5%-2. 214%Al (mole fraction) was investigated over the temperature range of 1 023 -
【机 构】
：
State Key Laboratory for Mechanical Behavior of Materials,School of Materials Science and Engineerin
【基金项目】
：
国家高技术研究发展计划(863计划);河南省自然科学基金
论文部分内容阅读
The kinetics of internal oxidation of dilute Cu-Al alloys, containing 0. 447 5%-2. 214%Al (mole fraction) was investigated over the temperature range of 1 023 - 1 273 K and the depth of internal oxidation was measured by microscopy. Based on non-steady-state diffusion, a rate equation is derived to describe the kinetics of internal oxidation of plate: X=k√t, where X is the oxidation depth, t is the oxidation time. For the internal oxidation of Cu-Al alloys employed in the synthesis of alumina dispersion strengthened copper, the permeability of oxygen in solid copper is obtained from the internal oxidation measurements. Investigation shows that the depth of the internal oxidation is a parabolic function of time, the typical shape of the front of internal oxidation is of planar morphology,and there is no evidence for preferential diffusion along grain boundaries.
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