Bio-Inspired Ceramic/Carbon Composites
Abstract
One of the major difficulties encountered in the sintering of the porous SiC scaffolds fabricated by freeze casting was to achieve full densification of the lamellae while controlling grain growth. Scaffold sintering has to be presureless to preserve the porous structures and as it was described in previous report low sintering temperatures resulted in fine grains but poor densification while high- sintering temperatures promoted densification but also grain growth with formation of large SiC platelets. This happened using oxide and non- oxide sintering additives and it will be advantageous to develop a process that will allow the formation of scaffolds with dense lamellae while controlling grain growth. This is important, as dense lamellae are required for the fabrication of strong composites through the infiltration of the scaffolds with a second phase. To address this problem, we have investigated an alternative approach based on the control of the sintering atmosphere using powder beds.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2013
- Accession Number
- ADA580827
Entities
People
- Eduardo S. Gutierrez
Organizations
- Imperial College London