Finite Element Analysis of Eutectic Structures
Abstract
Eutectics are multiphase structures formed by the cooperative growth of two or more phases. Although the internal structure can vary widely, the development of continuous rods or plates in a matrix can be tailored through directional solidification, providing a pathway to design superior aeronautical structures with integrated functionalities. Three main topics have been investigated: (i) Thermoelectric properties of the W/Si/Ge alloy system with varying concentration levels of germanium and tungsten demonstrated as a suitable high temperature p-type thermoelectric material exhibiting high power factors, >3,000 W/m-K2 at the optimum operating temperature. The results suggest that W addition can reduce the use of expensive Ge component of the alloy. (ii) Boride ceramics were directionally solidified around LaB6-(TixZr1-x)B2 eutectic compositions. The directionally solidified rods were composed of LaB6 rich concentric belts surrounding large eutectic regions with a dense and uniform distribution of (TixZr1 x)B2 fibers inside a LaB6 matrix. The changes in fiber growth direction and facet types can improve the mechanical properties and failure mechanisms of the material.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 12, 2014
- Accession Number
- ADA598474
Entities
People
- Ali Sayir
- Alp Sehirlioglu
Organizations
- Case Western Reserve University