基体合金化和增强涂层对金属基复合材料气孔成核的影响

The Science, Automation, and Control of Material Processes Involving Coupled Transport and Rheology Changes Pub Date : 1999-11-14 DOI:10.1115/imece1999-1250

O. Ilegbusi, Jijin Yang

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引用次数: 0

摘要

研究了金属基复合材料压渗铸造过程中气孔形核的形成机制。对于各种基体/增强体系，考虑了五种界面配置。具有负曲率的界面(如空腔)是孔隙形成的潜在场所。在所考虑的体系中，Al/Al2O3体系最容易发生孔隙成核。适当的基体合金如Al/Al2O3体系中的Mg和Al/SiC体系中的Mg和Cu，以及增强涂层如SiC上的Cu涂层，可以有效地抑制孔隙的形成。

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Effect of Matrix Alloying and Reinforcement Coating on Porosity Nucleation in Metal-Matrix Composites

The mechanism of porosity nucleation in pressure infiltration casting of metal matrix composites is investigated. Five interfacial configurations are considered for a variety of matrix/reinforcement systems. Interfaces with negative curvature such as cavity are found to be potential sites for porosity formation. The Al/Al2O3 system is most susceptible to porosity nucleation for the systems considered. Appropriate matrix alloying such as Mg in Al/Al2O3 system, and Mg and Cu in Al/SiC system and reinforcement coating such as Cu coating on SiC, could be effective for suppressing porosity formation.

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The Science, Automation, and Control of Material Processes Involving Coupled Transport and Rheology Changes

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