Determination of surface properties of nickel supported on HY zeolite by TG, DTA and TPR

被引：0
|
作者：
A. M. Garrido Pedrosa
M. J. B. Souza
D. M. A. Melo
A. G. Souza
A. S. Araujo
机构：
[1] Federal University of Rio Grande do Norte,
[2] Department of Chemistry,undefined
[3] Federal University of Rio Grande do Norte,undefined
[4] Department of Chemical Engineering,undefined
[5] Federal University of Rio Grande do Norte,undefined
[6] Department of Chemistry,undefined
[7] Federal University of the Paraíba,undefined
[8] CCEN,undefined
[9] Department of Chemistry,undefined
[10] Federal University of Rio Grande do Norte,undefined
[11] Department of Chemistry,undefined
来源：
Journal of Thermal Analysis and Calorimetry | 2005年 / 79卷
关键词：
TG; DTA; nickel; TPR; HY zeolite;
D O I：
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中图分类号：
学科分类号：
摘要：
The effect of Ag addition on the phase transformations that occur in the Cu-10&percnt; Al alloy was studied using differential thermal analysis, scanning electron and optical microscopies and energy dispersive X-ray analysis. The results indicated that Ag addition is responsible for the separation of the reverse martensitic transformation in two stages, and for the refinement of the &agr;-phase grains. The relative amount of the &bgr;<Subscript>1</Subscript>&apos; martensitic phase, retained on slow cooling (above 2 K min<Superscript>-1</Superscript> of cooling rate), and the relative fraction of phase &agr;<Subscript> 2</Subscript> are increased. The solubility limit of Ag in the matrix is close to 6 mass&percnt; and at this concentration the maximum stability of the &bgr; -phase is reached.
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页码：439 / 443
页数：4
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