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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING · 2024 · IF 8.1

Ti3SiC2 MAX phase modified SiCf/SiC composites with high strength and thermal conductivity prepared by low-temperature reactive melt infiltration

Wenjie Zhu,Yujie Wang,Yuwei Ren,Minghang Li,Yichun Bi,Ce Zheng,Xiaoqiang Li

High-purity Ti 3 SiC 2 MAX phase was introduced into the Amosic 3-303 SiC fiber-reinforced SiC matrix composite as a modified matrix by Reaction Melt Infiltration (RMI) at 1250 °C, realizing the generation of high-purity Ti 3 SiC 2 phase without residual melt and by-products in the RMI matrix. This modification reduced the porosity of the SiC f /SiC-Ti 3 SiC 2 composite from 10 to 20% typically found in SiC f /SiC composite prepared by Chemical Vapor Infiltration (CVI) to 6%, and the densification process cycle time by 70%. The flexural strength and thermal conductivity were enhanced by 12% and 58%, respectively. The microstructure and phase evolution of Ti 3 SiC 2 in the SiC f /SiC composite matrix was systematically investigated, offering new insights into the ceramic matrix growth process during RMI. This work proposes a new method for utilizing the RMI process to prepare high-performance nuclear SiC f /SiC-based composites.

CAS / MDL: 9003-01-4

研究领域: 材料科学 · 核能工程

✓ 已验证产品关联 DOI 高影响因子

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POLYMER COMPOSITES · 2017 ·Vol. 39 ·期 10 ·3705-3711 · IF 2.324

High performance nanocomposites from Ti3SiC2 MAX phase and phthalonitrile resin

Mehdi Derradji,Abdelkhalek Henniche,Jun Wang,Abdul Qadeer Dayo,Jia-hu Ouyang,Wen-bin Liu,Aboubakr Medjahed

A new kind of nanocomposites was prepared from a high performance phthalonitrile resin and Ti 3 SiC 2 MAX phase ceramic nanoparticles. The synergistic combination of both phases led to nanocomposites with improved thermal and mechanical properties. For instance, the thermal conductivity and tensile properties of the neat resin were highly enhanced on adding more nanofillers contents. Moreover, the phthalonitrile resin toughness was enhanced by 123% at the maximum nanoparticles loading of 15 vol.%. The experimental investigations were also compared with predictions from Series, Halpin-Tsai, and Kerner models and a full discussion was provided. A high resolution transmission electron microscope confirmed the ability of the MAX phase to create a conductive network, especially at high nanofillers amounts. SEM analyses of the tensile fractured surfaces revealed positive changes in the morphology, such as an increase in the roughness and amount of hackling as well as the formation of multiple micro-cracks. The MAX phase also enhanced the thermal stability, stiffness, and glass transition temperature of the neat resin. This work confirms the superiority of the MAX phase ceramics over the traditional ones in enhancing the properties of the phthalonitrile resin and opens the way for further research in the field. POLYM. COMPOS., 39:3705–3711, 2018. © 2017 Society of Plastics Engineers

CAS / MDL: 591-27-5 80-05-7

研究领域: 材料科学 · 复合材料工程

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Ti3SiC2 MAX phase modified SiCf/SiC composites with high strength and thermal conductivity prepared by low-temperature reactive melt infiltration

High performance nanocomposites from Ti3SiC2 MAX phase and phthalonitrile resin