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Making lightweight SiC(rGO, xMoSi 2 ) bulk ceramics via polymeric precursor route
Author(s) -
Yao Rongqian,
Zheng Yig,
Jin Chao,
Huang Wenyan,
Han Yuchen,
Li Ke,
Lan Siqi,
Huang Zhenguo,
Hu Jiahao,
Zhang Yinggan
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17613
Subject(s) - materials science , ceramic , fracture toughness , composite material , oxide , graphene , toughness , pyrolysis , yield (engineering) , thermal conductivity , shrinkage , chemical engineering , nanotechnology , metallurgy , engineering
Unique properties of MoSi 2 open new opportunities for preparing bulk polymer‐derived ceramics (PDCs) displaying favorable structural‐functional capabilities. Herein, an ingenious production route via re‐pyrolysis process of ball‐milling‐induced rigid SiC(rGO, x MoSi 2 ) p fillers/flexible polycarbosilane‐vinyltriethoxysilane‐graphene oxide (PCS‐VTES‐GO, PVG) precursors blends is proposed to obtain in situ formed SiC(rGO, x MoSi 2 ) bulk PDCs. Interestingly, the possible dense β‐SiC/SiO x C y /C free (rGO, x MoSi 2 ) framework suffers load and tiny microsized pores relaxes stress, which is beneficial to providing optimized hardness and fracture toughness, ceramic yield, and linear shrinkage. Attractively, MoSi 2 prominently enhances thermal and electrical conductivities of the products owing to increased continuity and compactness. To the best of our knowledge, lightweight SiC(rGO, 20%MoSi 2 ) bulk PDCs own brilliant ceramic yield (92.13%), liner shrinkage (6.69%), hardness (10.34 GPa), fracture toughness (4.35 Mpa·m 1/2 ), and thermal conductivity (8.57 W·m –1 ·K –1 ), opening potential emerging uses in aerospace fields.