Department
Materials Science and Engineering
Major
Ceramic Engineering
Research Advisor
Dogan, Fatih
Advisor's Department
Materials Science and Engineering
Funding Source
CAMT Project 4.1
Abstract
Laminar composites are needed for many applications ranging from structural materials to aerospace engine components to biomedical implants. Unfortunately, different expansion coefficients of materials cause them to separate during sintering which can lead to failure of the composite samples. This project optimizes and employs rapid freeze spraying technology to fabricate prototypes with graded alumina and zirconia structures in order to form gradual transitions between coefficients of thermal expansion.
Rapid freeze spraying significantly decreases costs for manufacturing because sample fabrication time decreases, and expensive dies are no longer required. The process is also environmentally friendly because the materials used possess a low organic content. In addition, our research has shown that graded composites with gradual transitions between coefficients of thermal expansion are less susceptible to crack formation during sintering. This can lead to tougher materials for use in biomedical applications, structural materials, and aerospace engine components.
Biography
Ashlee Abbott is from Rolla, Missouri and is currently a sophomore e nrolled in the Ceramic Engineering program at the University of Missouri - Rolla. She is the daughter of Gary and Joyce Abbott. She has been researching composites since May 2005.
Research Category
Engineering
Presentation Type
Poster Presentation
Document Type
Poster
Location
Havener Center, Carver-Turner Room
Presentation Date
11 April 2007, 9:00 am - 11:45 am
Rapid Freeze Spraying of Graded Laminar Composites
Havener Center, Carver-Turner Room
Laminar composites are needed for many applications ranging from structural materials to aerospace engine components to biomedical implants. Unfortunately, different expansion coefficients of materials cause them to separate during sintering which can lead to failure of the composite samples. This project optimizes and employs rapid freeze spraying technology to fabricate prototypes with graded alumina and zirconia structures in order to form gradual transitions between coefficients of thermal expansion.
Rapid freeze spraying significantly decreases costs for manufacturing because sample fabrication time decreases, and expensive dies are no longer required. The process is also environmentally friendly because the materials used possess a low organic content. In addition, our research has shown that graded composites with gradual transitions between coefficients of thermal expansion are less susceptible to crack formation during sintering. This can lead to tougher materials for use in biomedical applications, structural materials, and aerospace engine components.
