Preparation and properties of in-situ mullite whiskers reinforced aluminum chromium phosphate wave-transparent ceramics

2017 ◽  
Vol 37 (15) ◽  
pp. 4793-4799 ◽  
Author(s):  
Ning Chen ◽  
Haibin Wang ◽  
Jichuan Huo ◽  
Shuxin Liu ◽  
Jichuan He
Keyword(s):  
Transparent Ceramics ◽  
Mullite Whiskers ◽  
Chromium Phosphate

Optimization on Influencing Factors of Fracture Toughness of Corundum-Mullite Toughened by In Situ Synthesized Mullite Whiskers by Response Surface Methodology

2012 ◽  
Vol 581-582 ◽  
pp. 819-822 ◽  
Author(s):  
Bin Meng ◽  
Jin Hui Peng
Keyword(s):  
Fracture Toughness ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Response Surface Method ◽  
Sintering Temperature ◽  
Surface Method ◽  
Mullite Whiskers ◽  
Optimized Conditions ◽  
Addition Amount

The corundum-mullite was toughened by in-situ synthesized mullite whiskers and the process parameters influencing the fracture toughness of corundum-mullite, such as sintering temperature, addition amount of AlF3 and V2O5, were optimized by means of response surface method. Corundum-mullite with fracture toughness of 9.44 MPa.m-1/2 could be obtained under the optimized conditions, i.e. sintering temperature of 1400°C, 4.8 wt.% of AlF3 and 5.8 wt.% of V2O5. The results showed that it was feasible to prepare corundum-mullite toughened by in-situ synthesized mullite whiskers by the optimized parameters. In addition, an accurate model based on response surface method was proposed to predict the experimental results.

Preparation and characterization of mullite microspheres based porous ceramics with enhancement of in-situ mullite whiskers

2019 ◽  
Vol 45 (12) ◽  
pp. 14517-14523 ◽  
Author(s):  
Ping Yi ◽  
Pengda Zhao ◽  
Deqiang Zhang ◽  
Han Zhang ◽  
Huizhong Zhao
Keyword(s):  
Porous Ceramics ◽  
Mullite Whiskers

Investigation of the Cracking Behaviors by Indentation Based on an In Situ Observation

2014 ◽  
Vol 627 ◽  
pp. 361-364 ◽  
Author(s):  
Yasuhiro Yamazaki
Keyword(s):  
Indentation Test ◽  
Crack Size ◽  
Indentation Load ◽  
In Situ Measurement ◽  
Observation System ◽  
In Situ Observation ◽  
Test Machine ◽  
Transparent Ceramics ◽  
The Relationship

In this paper, an in-situ measurement of crack size as a function of applied indentation load during indentation test was conducted. To perform the in-situ measurement, an instrumented indentation test machine with the in-situ observation system was developed and used. The joints of transparent ceramics by diffusion bonding were prepared as the specimen used in this study. The indentations were performed at the interface of the joints, and in the monolithic transparent ceramics by means of the instrumented indenter with the in-situ observation system. The relationship between crack shape and indentation load, as well as, the effect of the indenter shape on it were discussed.

A novel approach to prepare high strength and high porosity reticulated porous ceramics by in-situ synthesis of mullite whiskers

2021 ◽  
Vol 47 (10) ◽  
pp. 14561-14568
Author(s):  
Dong Lao ◽  
Peng Lin ◽  
Xiajie Liu ◽  
Ruoyu Chen ◽  
Wenbao Jia ◽  
...  
Keyword(s):  
High Strength ◽  
Porous Ceramics ◽  
In Situ Synthesis ◽  
High Porosity ◽  
Novel Approach ◽  
Mullite Whiskers

Sic Based Ceramic Foams Reinforced by In Situ Mullite Whisker

2009 ◽  
Vol 79-82 ◽  
pp. 1983-1986 ◽  
Author(s):  
Xiao Li Ji ◽  
Fei Xu ◽  
Hai Ya Chen
Keyword(s):  
Compressive Strength ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Ceramic Foams ◽  
Sic Ceramic ◽  
Influence Of Temperature On ◽  
Shock Resistance ◽  
Mullite Whiskers ◽  
Maximum Compressive Strength

Prepared silicon carbide(SiC) ceramic foams combined with mullite whiskers which synthesized by in-situ reaction. Studied on the influence of temperature on the synthesis of mullite whisker, and the influence of mullite content on the compressive strength, thermal shock resistance of SiC ceramic foams. The results indicate that the performance of mullite whiskers synthesized at 1400°Cwere best, when mullite content was 25%, SiC ceramic foams could reach the maximum compressive strength for 1.75MP, the most thermal shock resistance for14 times.

Preparation of porous Al2TiO5 ceramics reinforced by in situ formation of mullite whiskers

2013 ◽  
Vol 47 ◽  
pp. 57-60 ◽  
Author(s):  
Guogang Xu ◽  
Yinghua Ma ◽  
Guozhi Ruan ◽  
Hongzhi Cui ◽  
Zhihui Zhang ◽  
...  
Keyword(s):  
Mullite Whiskers ◽  
In Situ Formation

A composite structural high-temperature-resistant adhesive based on in-situ grown mullite whiskers

2020 ◽  
Vol 23 ◽  
pp. 100944 ◽  
Author(s):  
Zhaojie Feng ◽  
Mingchao Wang ◽  
Ruoyun Lu ◽  
Wence Xu ◽  
Ting Zhang ◽  
...  
Keyword(s):  
High Temperature ◽  
Mullite Whiskers ◽  
Structural High

In Situ Growth of Mullite Whisker Using Different Aluminium Source and Properties of Mullite-Corundum Lightweight Refractory

2016 ◽  
Vol 848 ◽  
pp. 328-332 ◽  
Author(s):  
Xin Hao Li ◽  
Xing Yong Gu ◽  
Wei Xia Dong ◽  
Ting Luo
Keyword(s):  
Bending Strength ◽  
Influence Factors ◽  
Diameter Ratio ◽  
Apparent Porosity ◽  
X Ray Diffraction ◽  
Lightweight Refractory ◽  
Dry Pressing ◽  
Mullite Whiskers ◽  
Length To Diameter Ratio

In-situ growth of mullite whisker from waste coal gangue and different aluminium source mixtures by dry pressing were investigated aiming at the preparation of mullite - corundum lightweight refractory by controlling mullite whisker precursor pseudo particle size and quantity in corundum matrix. The phase composition and microstructure were studied using X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. Apparent porosity and bending strength were also measured. The samples exhibited characteristic alumina and mullite phases. The formation mechanism and influence factors for mullite whiskers materials were discussed. The experimental results showed that the whisker of the obtained sample changed from the accumulated short column to mesh cross acicular whisker shape, and the length to diameter ratio increases. When the aluminium source was aluminium hydroxide, the length to diameter ratio and apparent porosity reached the maximum of 17.6 and the minimum of 2.15%. The bending strength of all the samples was similar, that of the sample prepared by calcined bauxite was the largest (84 MPa), that of the sample prepared by calcined alumina was inferior, and the sample prepared by aluminum hydroxide was the lowest.

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