scholarly journals Microstructure and Properties of ZrO2-AlN Composite Ceramics by Microwave Sintering

2021 ◽  
pp. 150
Author(s):  
MU Tinghai ◽  
XU Wentao ◽  
LING Junrong ◽  
DONG Tianwen ◽  
QIN Zixuan ◽  
...  
Keyword(s):  
Microwave Sintering ◽  
Composite Ceramics ◽  
Microstructure And Properties

scholarly journals Microstructure and properties of the Nd2Fe14Bp/Al–Co composites fabricated via microwave sintering

2021 ◽  
Vol 10 ◽  
pp. 34-50
Author(s):  
G.R. Li ◽  
J.J. Chen ◽  
D. Zhang ◽  
H.M. Wang ◽  
M. Liu ◽  
...  
Keyword(s):  
Microwave Sintering ◽  
Microstructure And Properties

Phase evolution and microstructure of new Sr0.5Zr2(PO4)3-NdPO4 composite ceramics prepared by one-step microwave sintering

2020 ◽  
Vol 46 (12) ◽  
pp. 19822-19826
Author(s):  
Lei Zhan ◽  
Junxia Wang ◽  
Jin Wang ◽  
Xue Zhang ◽  
Yufeng Wei ◽  
...  
Keyword(s):  
Microwave Sintering ◽  
Phase Evolution ◽  
Composite Ceramics ◽  
One Step

scholarly journals Microstructure and Properties of Thermal Electrode Material Si3N4–MoSi2 Composite Ceramics

Materials ◽  
2018 ◽  
Vol 11 (6) ◽  
pp. 986 ◽  
Author(s):  
Lichao Feng ◽  
Pengfei Guan ◽  
Xuemei Yu ◽  
Yiqiang He
Keyword(s):  
Electrode Material ◽  
Composite Ceramics ◽  
Microstructure And Properties ◽  
Mosi2 Composite ◽  
Thermal Electrode

Effect of AlF3 Content on Microstructure and Properties of Mullite/Al2O3 Composite Ceramics

2018 ◽  
Vol 922 ◽  
pp. 62-67
Author(s):  
Ke Zheng Sang ◽  
Fan Wang ◽  
De Jun Zeng ◽  
Hong Wei Li
Keyword(s):  
Fracture Toughness ◽  
Flexural Strength ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Diameter Ratio ◽  
Pressureless Sintering ◽  
Composite Ceramics ◽  
Microstructure And Properties ◽  
Shock Resistance ◽  
Mullite Whiskers

To reinforce the mullite/Al2O3 composite ceramics through formation of mullite whiskers, the composite ceramics were prepared by pressureless sintering using different AlF3 content. The microstructure, porosity, fracture toughness and thermal shock resistance of the composite ceramics were investigated. The results show that the addition of AlF3 can promote the mullite whisker formations, and the whiskers with the size of 3～10μm in diameter and a length-diameter ratio of 10～15 are obtained by sintering at 1600°C with the AlF3 content of 5wt%. Fracture toughness and thermal shock resistance of the composite ceramics are improved by the formation of mullite whisker. The fracture toughness of 4.79MPa•m1/2 can be obtained, and the 95.18% flexural strength remained after thermal shock.

Effects of Dispersant on Microstructure and Properties of GPLs/Al2O3 Composite Ceramics via Microwave Sintering

2018 ◽  
Vol 768 ◽  
pp. 193-198
Author(s):  
Ying Liu ◽  
Wen He ◽  
Yun Long Ai ◽  
Qiu Yu Zhang ◽  
Wei Hua Chen
Keyword(s):  
Fracture Toughness ◽  
Ph Value ◽  
Microwave Sintering ◽  
Dimethyl Formamide ◽  
High Dispersion ◽  
Ammonium Bromide ◽  
Composite Ceramics ◽  
Alumina Composite ◽  
Cetyl Trimethyl Ammonium ◽  
Methyl Pyrrolidone

Three dispersants cetyl trimethyl ammonium bromide (CTMAB), N-N dimethyl formamide (DMF) and N-methyl pyrrolidone (NMP) were added to disperse graphene (GPLs) and a type of graphene/alumina composite ceramics was fabricated by microwave sintering. The GPLs dispersion was characterized by Zeta potential, XRD and SEM. The experimental results show that anionic dispersant NMP has the best dispersion effect with no impurities when pH value is 5. Using dispersant NMP, 0.4vol.%GPLs/Al2O3 composites with high dispersion obtains a relative density of 98.76% at 1500°C for 30 min by microwave sintering. The microhardness, fracture toughness and flexural strength of this composites are 19.58GPa, 6.19MPa·m1/2 and 365.10MPa, respectively. Its fracture toughness respectively increases by 47% and 15% than that of composites using dispersants DMF and CTMAB.

Preparation and Characterization of 3Y-ZrO2 Composite Ceramics

2018 ◽  
Vol 281 ◽  
pp. 189-194
Author(s):  
Yin Yan Ju ◽  
Xue Xian Gan ◽  
Jie Guang Song ◽  
Fang Wang ◽  
Qun Huang ◽  
...  
Keyword(s):  
Ball Milling ◽  
Bending Strength ◽  
Raw Materials ◽  
Microwave Sintering ◽  
Linear Shrinkage ◽  
Organic Substrate ◽  
Mass Ratio ◽  
Composite Ceramics ◽  
Surface Morphologies

Dense 3Y-ZrO2composite ceramics were prepared by using 3Y-ZrO2nanopowders as the raw materials, via the process of ball milling, granulating, molding and calcination.We investigated the microstructure, surface morphologies, the mechanical property, the density and linear shrinkage rate of the sintered ceramics and the effect of the ball milling technics and the sintering technics on the above properties of the3Y-ZrO2composite ceramics via SEM and testing. The results show that the most excellent technics in all was explored as follows: the ultrafine ball milling by adding zirconium balls of 2 mm at the speed of 35 r/min for 10 h, with the mass ratio of zirconium ball, water and mixed powders of 6:1:1, the granulaing with 1.5% PVA, the CIP, the pre-sintering to remove the organic substrate to 500°C and the microwave sintering from 20°C to 1450 °Cin 80 min in which the duration at 1450°C was 20 min and the natural cooling time of the samples was 90 min. And the 3Y-ZrO2composite ceramics obtained by this process have a relative density of 99.2%, bending strength of 1098 MPa, and a fracture toughness of 7.8 MPa·m1/2.

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