Multifunctional Ceramic- and Metal-matrix Composites: Processing, Microstructure, Properties and Performance: Poster Session
Program Organizers: Martin Pech-Canul, Cinvestav IPN Saltillo; Xiaoming Wang, Purdue University; Golam Newaz, Wayne State University

Tuesday 12:00 PM
October 1, 2019
Room: Exhibit Hall CD
Location: Oregon Convention Center

Session Chair: Martin Pech-Canul, Cinvestav IPN Saltillo

P2-66: Test and Evaluation of SiC/SiC Composites for High Temperature Components of the H-class Gas Turbine: In-Sub Han1; Seyoung Kim1; Soohyun Kim1; Young-Hoon Seong1; Jaehyung Choi1; Hyungjoon Bang1; 1Korea Instute of Energy Research
    Conventional metal based gas turbine components need forced cooling to overcome the limit of operation temperature, so the components having low heat-resistant temperatures have been a problem to lower the efficiency and power of gas turbines. In this study, a SiC fiber based CMC material having a non-cooling heat-resistant temperature of 1315°C was developed for H-Class gas turbine parts used in turbine inlet temperature of 1600°C. First, BN multi-coating process of fiber interface was optimized to prevent SiC fiber damages during melt-infiltration process for matrix densification, and slurry impregnation and fiber volume ratio control technology was developed. To evaluate the high temperature mechanical performances of the CMC material, we conducted three point bending and tensile tests, and it was confirmed that the developed SiC/SiC material has a bending strength of 268 MPa and a tensile strength of 159 MPa in 1315°C environment.

P2-67: Hybrid Ceramic Matrix Composites: Martin Pech-Canul1; Socorro Valdez2; Evangelina Trujillo-Vazquez3; Juan Guía-Tello4; Máximo Pech-Canul5; Josué Aguilar-Martínez6; Luis González-López1; 1Cinvestav IPN Saltillo; 2UNAM; 3Benemérita Universidad Autónoma de Puebla; 4Centro de Investigación en Materiales Avanzados (CIMAV),; 5Cinvestav IPN Mérida; 6Universidad Autónoma de Nuevo León
    According to the literature, in the hybrid ceramic matrix composites (HCMCs) at least one of the constituents is not homogeneous from the chemical or microstructure viewpoint. It is also considered that when both aligned continuous ceramic fibers and randomly dispersed fine whiskers reinforce a ceramic matrix, the material is a hybrid ceramic matrix composite. The ceramic matrix and the ceramic fibers are bonded through thin interphase. And when the constituents are non-oxide in nature, they are prone to oxidation and must be protected by coatings. Although HCMCs are attractive for a variety of mechanical and thermal applications, when hybrid matrices, coatings, and interphases are used, the material can be tailored for withstanding aggressive environments. Covering a description of ceramic matrix composites briefly, the present contribution is a short overview of the current status in the processing and properties of hybrid ceramic matrix composites.