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Empirical model to predict mass gain of cobalt electroless deposition on ceramic particles using response surface methodology

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Rare Metals 2017年第3期36卷 209-219页

作者： Akbar Heidarzadeh Reza Taherzadeh Mousavian Rasoul Azari Khosroshahi yalda a.afkham Hesam Pouraliakbar Faculty of Engineering Azarbaijan Shahid Madani UniversityTabriz 7200-000Iran Department of Materials Engineering Sahand University of TechnologyTabriz 65175-4171Iran Department of Advanced Materials WorldTech Scientific Research Center(WT-SRC)Tehran 71857-3834Iran

This investigation was undertaken to predict the mass gain （MG） of cobalt electroless deposition （ED） on ceramic SiC *** surface methodology （RSM） based on a full factorial design with three ED parameters and 30 runs was used to conduct the experiments and to establish a mathematical model by means of Design-Expert *** ED parameters considered were pH,bath temperature and ceramic particle *** of variance was applied to validate the predicted *** results of confirmation analysis by scanning electron microscopy （SEM） show that the developed models are reasonably *** pH is the most effective parameter for the ***,the highest mass gain is obtained for the lowest pH,highest bath temperatures and heat-treated SiC *** addition,the developed model shows that the optimal parameters to get a maximum value of mass gain are pH,bath temperature and ceramic particle state of 8,70 ℃ and heat treatment,respectively.

关键词： Electroless deposition Cobalt SiC particles Mathematical model Response surface method

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On the Cozero-Divisor Graphs of Commutative Rings

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Applied Mathematics 2013年第7期4卷 979-985页

作者： Mojgan afkham Kazem Khashyarmanesh Department of Pure Mathematics Ferdowsi University of Mashhad Mashhad Iran

Let R be a commutative ring with non-zero identity. The cozero-divisor graph of R, denoted by , is a graph with vertices in , which is the set of all non-zero and non-unit elements of R, and two distinct vertices a and b in are adjacent if and only if and . In this paper, we investigate some combinatorial properties of the cozero-divisor graphs and such as connectivity, diameter, girth, clique numbers and planarity. We also study the cozero-divisor graphs of the direct products of two arbitrary commutative rings.

关键词： Clique Number Connectivity Cozero-Divisor Graph Diameter Direct Product Girth Rings of Polynomials Rings of Power Series.

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