Pressurless infiltration of Al2O3 preform containing aligned two dimensional channels with Al-Mg-Si alloy
Abstract
Pressureless infiltration methods have been investigated in order to avoid the cost and complexities associated with pressure or vacuum assisted infiltration during the fabrication of ceramic-metal composites. Several important parameters need to be considered during this process including the magnesium content in the alloy, purity of the nitrogenous atmosphere, isothermal soak duration and temperature, and the ceramic preform itself. The majority of studies utilizing a pressureless infiltration process involve ceramic preforms that are of the form of packed particulate beds, fibers, foams, or other replicate templates. In this study, the focus will be on the fabrication of a ceramic-matrix composite through the use of a tailorable ceramic preform. The ceramic preform will be a dense alumina body containing strategically placed channels that are exposed to the surface. A pressureless infiltration process will be used to infiltrate these channels. In this way, the reinforcement architecture can be tailored in terms of the size, shape, and orientation in order to produce the properties that befit the desired application.
Publication Title
Mechanical Properties and Performance of Engineering Ceramics and Composites XI
Recommended Citation
Hammel, E., Shohag, M., Olawale, D., Okoli, O., & Ravi, V. (2017). Pressurless infiltration of Al2O3 preform containing aligned two dimensional channels with Al-Mg-Si alloy. Mechanical Properties and Performance of Engineering Ceramics and Composites XI, 207-215. https://doi.org/10.1002/9781119320104.ch18
