Proceeding of the 42nd International Conference on Advanced Ceramics and Composites, Ceramic Engineering and Science Proceedings Volume 39, Issue 2, 2018 Jonathan Salem, Dietmar Koch, Peter Mechnich, Mihails Kusnezoff, Narottam Bansal, Jerry LaSalvia, Palani Balaya, Zhengyi Fu, and Tatsuki Ohji, Editors Valerie Wiesner and Manabu Fukushima, Volume Editors This proceedings contains a collection of 25 papers from The American Ceramic Society's 41st International Conference on Advanced Ceramics and Composites, held in Daytona Beach, Florida, January 21-26, 2018. This issue includes papers presented in the following symposia: • Symposium 1: Mechanical Behavior and Performance of Ceramics and Composites • Symposium 2: Advanced Ceramic Coatings for Structural, Environmental, and Functional Applications • Symposium 3: 15th International Symposium on Solid Oxide Fuel Cells (SOFC) • Symposium 4: Armor Ceramics: Challenges and New Developments • Symposium 6: Advanced Materials and Technologies for Direct Thermal Energy Conversion and Rechargeable Energy Storage • Symposium 8: 12th International Symposium on Advanced Processing & Manufacturing.