Preparation of Fe3Al Alloy by Combustion Synthesis Melt-Casting under Ultra-High Gravity

2011 ◽  
Vol 27 (5) ◽  
pp. 486-489 ◽  
Author(s):  
Peilin Mai ◽  
Guanghua Liu ◽  
Yixiang Chen ◽  
Jiangtao Li ◽  
Shuli He
Keyword(s):  
Combustion Synthesis ◽  
High Gravity ◽  
Fe3al Alloy

Microstructures and properties of large bulk solidified TiC–TiB2 composites prepared by combustion synthesis under high gravity

2009 ◽  
Vol 61 (3) ◽  
pp. 281-284 ◽  
Author(s):  
Zhongmin Zhao ◽  
Long Zhang ◽  
Yigang Song ◽  
Weiguo Wang ◽  
Hongbo Liu
Keyword(s):  
Combustion Synthesis ◽  
High Gravity ◽  
Large Bulk

Al2O3/ZrO2 (Y2O3) PREPARED BY COMBUSTION SYNTHESIS UNDER HIGH GRAVITY

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1148-1153 ◽  
Author(s):  
LONG ZHANG ◽  
ZHONGMIN ZHAO ◽  
YIGANG SONG ◽  
WEIGUO WANG ◽  
HONGBO LIU
Keyword(s):  
Fracture Toughness ◽  
Flexural Strength ◽  
Combustion Synthesis ◽  
High Fracture Toughness ◽  
High Gravity ◽  
Transformation Toughening ◽  
Composite Ceramics ◽  
Directionally Solidified ◽  
High Fracture ◽  
Toughening Mechanisms

By introducing ZrO 2 (4 Y ) powder into the thermit, Al 2 O 3/ ZrO 2 (4 Y ) composite ceramics of different composition and microstructures were prepared through combustion synthesis under high gravity, and the correlations of composition, microstructures and mechanical properties of composite ceramics were investigated. The results of XRD, SEM and EDS showed that Al 2 O 3/33% ZrO 2 (4 Y ) were composed of random-orientated rod-shaped colonies consisting of a triangular dispersion of orderly submicron-nanometer t - ZrO 2 fibers, surrounded by inter-colony regions consisting of spherically-shaped micronmeter t - ZrO 2 grains; meanwhile, Al 2 O 3/45% ZrO 2 (4 Y ) were comprised of spherically-shaped micron-meter t - ZrO 2 grains. Similar to the international directionally solidified Al 2 O 3/ ZrO 2 ( Y 2 O 3), the EDS results also indicated that there are no impurities, amorphous phases and grain boundaries but clean phase interfaces in two ceramic composites. Compared to the international directionally solidified Al 2 O 3/ ZrO 2 ( Y 2 O 3), the increase in hardness and flexural strength of Al 2 O 3/33% ZrO 2 (4 Y ) in the experiment was due to small-size defect and high fracture toughness induced by compressive residual stress effect and transformation toughening mechanisms; meanwhile, high flexural strength of Al 2 O 3/45% ZrO 2 (4 Y ) was considered to be a result of the fine spherically-shaped t - ZrO 2 grains separated from the melt under high gravity, and high fracture toughness induced by transformation toughening and micro-crack toughening mechanisms.

Ti-Al-Nb Material for High-Temperature Applications: Combustion Synthesis from Oxide Raw Materials

2017 ◽  
Vol 746 ◽  
pp. 262-266
Author(s):  
D.E. Andreev ◽  
V.I. Yukhvid ◽  
Denis M. Ikornikov ◽  
Vladimir N. Sanin
Keyword(s):  
High Temperature ◽  
Combustion Synthesis ◽  
Raw Materials ◽  
High Gravity ◽  
Target Product ◽  
Oxide Materials ◽  
Centrifugal Shs ◽  
First Time ◽  
Metallic Impurities ◽  
Temperature Applications

This work is focused on preparation of Nb-doped Ti–Al material (Ti–29.3Al–17.6Nb wt %) by centrifugal SHS. Results of studying of combustion and synthesis regularities of intermetallic material on γ-TiAl base from oxide materials under high gravity are presented in the article. For the first time is used a reduction mixture on Al/Ca base which markedly increases the yield of Ti–Al–Nb and decreases the amount of non-metallic impurities (oxygen, nitrogen, carbon) in target product.

Large Bulk Al2O3/ZrO2 (Y2O3) Nanocrystalline Composites Prepared by Combustion Synthesis under High Gravity

2010 ◽  
Vol 434-435 ◽  
pp. 9-12 ◽  
Author(s):  
Zhong Min Zhao ◽  
Long Zhang ◽  
Chuan Zeng Pan ◽  
Quan Yang ◽  
Zhen Sheng Qu ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Flexural Strength ◽  
Relative Density ◽  
Combustion Synthesis ◽  
High Gravity ◽  
Gravity Level ◽  
Nanocrystalline Composites ◽  
Large Bulk ◽  
The Matrix ◽  
High Gravity Field

The large bulk Al2O3/ZrO2 (Y2O3) eutectics were achieved by combustion synthesis in high-gravity field. With increasing high-gravity level, the matrix of eutectics transformed the rod-shaped colonies from the cellular ones, and the nanocrystalline microstructures came into existence as the high-gravity level was larger than 200g. The relative density, hardness, flexural strength and fracture toughness increased simultaneously with increasing high-gravity level, and reached the maximum values of 98.6%, 18.6GPa, 1248MPa and 15.6MPa•m1/2 respectively as the high-gravity level was 250g.

Ceramic-Metal Functionally Gradient Multilayer Composite Fabricated by Combustion Synthesis in High-Gravity Field

2016 ◽  
Vol 680 ◽  
pp. 174-178
Author(s):  
De Jun Yin ◽  
Zhong Min Zhao ◽  
Long Zhang
Keyword(s):  
Gravity Field ◽  
Combustion Synthesis ◽  
Interfacial Shear Strength ◽  
Interfacial Shear ◽  
High Gravity ◽  
Multilayer Composite ◽  
Functionally Gradient ◽  
42Crmo Steel ◽  
Multilayer Composites ◽  
High Gravity Field

By taking combustion synthesis in high-gravity field to achieve fusion bonding of TiB2-based ceramic, Ti-6Al-4V alloy, the mid-ceramic and 42CrMo steel simultaneously, the ceramic-metal FG multilayer composites with the continuously-graded interfacial microstructures were successfully fabricated. XRD, FESEM and EDS results showed the formation of continuously-graded interfacial microstructures among TiB2-based ceramic, Ti-6Al-4V alloy, the mid-ceramic and 42CrMo steel resulted from thermal explosion reaction caused by high gravity field, liquid fusion of the ceramic, Ti-6Al-4V alloy, the mid-ceramic and 42CrMo steel, so hard-by-soft distribution in the hardness of FG multilayer composite was presented, and the interfacial shear strength of TiB2-based ceramic and Ti-6Al-4V alloy, and the mid-ceramic and 42CrMo steel measured 198 ± 25 MPa and 130 ± 15 MPa, respectively.

Preparation of Al2O3–ZrO2–SiO2 ceramic composites by high-gravity combustion synthesis

2013 ◽  
Vol 41 ◽  
pp. 622-626 ◽  
Author(s):  
Guanghua Liu ◽  
Quansheng Wang ◽  
Jiangtao Li ◽  
Yixiang Chen ◽  
Bin He
Keyword(s):  
Combustion Synthesis ◽  
Ceramic Composites ◽  
High Gravity
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