Microstructure and Interface Strength of MMCs Prepared by Pressureless Ni-Induced Infiltration Using Fe Alloy

Abstract:

Metal matrix composites (MMCs) were produced by Ni-induced pressureless infiltration using Fe alloy. The mainly fabrication process was that Ni and Al2O3 powders mixture was pressed and sintered after milled, and then the sintered Al₂O₃ ceramics were infiltrated by Fe alloy at 1600°C with 4h holding time. While the SEM and EPMA analyses indicated that the interface between ceramics and Fe alloy reaches a full homogeneity after infiltration and Fe alloy could infiltrate Al₂O₃ ceramic preforms and the maximum infiltration distance was more than 400 μm. This would increase the strength of interfacial due to excellent bonding interface. The fracture strength is about 63.0 MPa.

• Periodical: Applied Mechanics and Materials (Volumes 37-38)
• Pages: 652-657
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.37-38.652
• Online since: November 2010
• Authors: Shao Feng Yang, Wei Ping Chen, Meng Yan Han, De Zhi Zhu
• Keywords: Ceramic, Composite, Fe Alloy, Pressureless Infiltration

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