Synthesis and Properties of Ti3SiC2/SiC Ceramic Composites

2005 ◽  
Vol 475-479 ◽  
pp. 1243-1246 ◽  
Author(s):  
Tong Wei Lin ◽  
Wen Bin Cao ◽  
Jiang Tao Li ◽  
Chang Chun Ge
Keyword(s):  
Phase Composition ◽  
Active Carbon ◽  
Hot Pressing ◽  
Ceramic Composites ◽  
Displacement Reaction ◽  
Starting Mixture ◽  
Sic Ceramic ◽  
Different Content

Ti3SiC2/SiC ceramic composites with different content of SiC were synthesized through in-situ solid displacement reaction by hot pressing from starting mixture powders of TiC, Si and active carbon. The densities of the specimens were measured, the phase composition of the specimens was identified by XRD, and the microstructures were observed by SEM.

A study on in-situ synthesis of TiB2–SiC ceramic composites by reactive hot pressing

2014 ◽  
Vol 40 (1) ◽  
pp. 2305-2313 ◽  
Author(s):  
Guolong Zhao ◽  
Chuanzhen Huang ◽  
Hanlian Liu ◽  
Bin Zou ◽  
Hongtao Zhu ◽  
...  
Keyword(s):  
Hot Pressing ◽  
Ceramic Composites ◽  
In Situ Synthesis ◽  
Sic Ceramic ◽  
Reactive Hot Pressing

Graphene nanosheet reinforced ZrB2–SiC ceramic composite by thermal reduction of graphene oxide

RSC Advances ◽  
2015 ◽  
Vol 5 (58) ◽  
pp. 47060-47065 ◽  
Author(s):  
Xinghong Zhang ◽  
Yumin An ◽  
Jiecai Han ◽  
Wenbo Han ◽  
Guangdong Zhao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hot Pressing ◽  
Ceramic Composite ◽  
Graphene Nanosheets ◽  
Thermal Reduction ◽  
Graphene Nanosheet ◽  
Pressing Process ◽  
Sic Ceramic

A graphene nanosheets reinforced ZrB2–SiC ceramic composite was achieved by in situ thermal reduction of graphene oxide during hot pressing process.

Oxidation Behavior of Ti3SiC2-SiC Ceramic Composites

2007 ◽  
Vol 561-565 ◽  
pp. 687-691
Author(s):  
De Gui Zhu ◽  
Zhi Gang Wang
Keyword(s):  
Oxidation Resistance ◽  
Hot Isostatic Pressing ◽  
Ceramic Composites ◽  
Temperature Oxidation ◽  
Parabolic Law ◽  
Sic Ceramic ◽  
Long Time ◽  
Better Than ◽  
Oxidation Behaviors

The high temperature oxidation behaviors of the Ti3SiC2-SiC ceramic composites fabricated by in situ synthesis under hot isostatic pressing were studied by DSC. The results show that the growth of the oxide scales on Ti3SiC2-SiC ceramic composites obeys a parabolic law in air. The oxidation resistance at 1400°C is better than that at 1200°C for long time. The oxidation resistance of the Ti3SiC2-SiC ceramic composites is much higher than that of monolithic Ti3SiC2. The mechanism of oxidation of Ti3SiC2-SiC ceramic composites is discussed.

PECULIARITIES OF THE SYNTHESIS OF HIGH-TEMPERATURE CERAMICS TASI2–SIC, REINFORCED IN SITU BY DISCRETE SILICON CARBIDE NANOFIBERS

2018 ◽  
pp. 72-76
Author(s):  
S. Vorotilo ◽  
E. D. Polozova ◽  
E. A. Levashov
Keyword(s):  
Fracture Toughness ◽  
Silicon Carbide ◽  
High Temperature ◽  
Relative Density ◽  
Hot Pressing ◽  
Temperature Synthesis ◽  
Similar Composition ◽  
High Temperature Synthesis ◽  
Sic Ceramic

The possibility of the increase of the properties of ceramics in the TaSi2–SiC system via the reinforcement by the SiC nanofibers formed in situ in the combustion wave has been studied. For the formation of nanofibers as well as for increase of the exothermicity of the reaction mixtures, energetic additive PTFE (C2F4) was used. Using the method of self-propagating high-temperature synthesis of the mechanically activated mixtures, 70%TaSi2+30%SiC ceramic was produced, with SiC present as the round-shaped grains and as nanofibers. Ceramic specimens sintered by hot pressing were characterized by relative density up to 98 %, hardness 19,0–19,2 GPa and fracture toughness 7,5–7,8 MPa·m1/2, which is noticeably above the fracture toughness of the ceramic with similar composition produced without the PTFE additions.

Effect of TiC Content on the Microstructure and Mechanical Properties of Ti3AlC2/Al2O3 In Situ Composites Synthesized by Hot Pressing

2012 ◽  
Vol 724 ◽  
pp. 278-281 ◽  
Author(s):  
Lan Ye ◽  
Jian Feng Zhu
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Phase Composition ◽  
Flexural Strength ◽  
High Temperatures ◽  
Vickers Hardness ◽  
Hot Pressing ◽  
Microstructure And Mechanical Properties ◽  
Reactive Hot Pressing

The Ti3AlC2/Al2O3 in situ composites were successfully synthesized from the system of Ti-TiC-Al-TiO2 by reactive hot pressing at 1350 °C. The effect of TiC content on the phase composition, microstructure and mechanical properties were investigated in detail. The results indicate that the fabricated products possess the highest purity as the TiC contents reduce to 90 % of its theoretical content. This deviation is mainly attributed to the decomposition of Ti3AlC2 and vaporization of Al at high temperatures. The effect of TiC content on the fracture toughness, flexural strength, Vickers hardness of Ti3AlC2/Al2O3 composites was also discussed in detail.

Processing and Properties of (Zr,Hf)B2-SiC Ceramic Composites

2018 ◽  
Vol 281 ◽  
pp. 438-443 ◽  
Author(s):  
Xiao Tong Zhao ◽  
Hai Long Wang ◽  
Gang Shao ◽  
Bing Bing Fan ◽  
Hong Xia Lu ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Flexural Strength ◽  
Solid Solutions ◽  
Hot Pressing ◽  
Ceramic Composites ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sic Ceramic ◽  
Sic Composites

Different molar ratio of HfB2and ZrB2had been mixed, and 30 vol.% SiC was selected as sintering additives. The mixing powders were sintered by hot pressing at 1900 °C for 1 h under a pressure of 20 MPa in Ar atmosphere. X-ray diffraction, scanning microscopy and Archimedes’s method were used to characterize the phase, microstructure and density of the sintered composites. Meanwhile, the hardness, the fracture toughness and flexural strength of the obtained composites were considered too. It can be found that the (Zr,Hf)B2solid solutions were formed by HfB2and ZrB2during the sintering. The flexural strength of (Zr,Hf)B2-SiC composites increased with the amount of HfB2increasing, which reached (332±40) MPa for the composites content of 70% HfB2. Which fracture toughness was (2.22±0.25) MPa·m1/2. The highest Vickers’ harness of was (24.8±3.4) GPa for the composites content of 50% HfB2.

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