scholarly journals Examination of patterns in obtaining porous structures from submicron aluminum oxide powder and its mixtures

2020 ◽  
Vol 6 (6 (108)) ◽  
pp. 41-49
Author(s):  
Edwin Gevorkyan ◽  
Volodymyr Nerubatskyi ◽  
Yuriy Gutsalenko ◽  
Olga Melnik ◽  
Liudmyla Voloshyna
Keyword(s):  
Aluminum Oxide ◽  
Oxide Powder ◽  
Porous Structures ◽  
Aluminum Oxide Powder

Influence of Coating on Mechanical Performance of Lap-Spliced Carbon Fiber-Textile Reinforced Mortar (TRM)

2019 ◽  
Vol 972 ◽  
pp. 64-68
Author(s):  
Gia Toai Truong ◽  
Ngoc Hieu Dinh ◽  
Sang Hyun Park ◽  
Seung Jae Lee ◽  
Joo Young Kim ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Aluminum Oxide ◽  
Mechanical Performance ◽  
Ultimate Strain ◽  
Oxide Powder ◽  
Peak Strength ◽  
Lap Splice ◽  
Aluminum Oxide Powder ◽  
Coating Methods ◽  
Textile Reinforced Mortar

In this study, the effect of coating methods in the lap splice area on mechanical performance of lap-spliced carbon textile reinforced mortar (TRM) composites was investigated. The coating methods included textile reinforcement coated with epoxy, textile reinforcement coated with aluminum oxide powder and epoxy, and textile reinforcement coated with aluminum oxide powder, epoxy, and carbon fiber fabrics. It appears that the coated specimens showed higher peak strength and ultimate strain than those of the uncoated one.

scholarly journals Tensile Behaviors of Lap-Spliced Carbon Fiber-Textile Reinforced Mortar Composites Exposed to High Temperature

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1512 ◽  
Author(s):  
Gia Toai Truong ◽  
Sung-Ho Park ◽  
Kyoung-Kyu Choi
Keyword(s):  
High Temperature ◽  
Carbon Fiber ◽  
Aluminum Oxide ◽  
Surface Treatment ◽  
Ultimate Strain ◽  
Oxide Powder ◽  
Peak Strength ◽  
Lap Splice ◽  
Aluminum Oxide Powder ◽  
Textile Reinforced Mortar

The tensile behaviors of textile-reinforced mortar (TRM) composites made with carbon fiber textile and alumina cement-based mortar were investigated through direct tensile tests. Three different surface treatment details in the lap splice area were used to improve the tensile behaviors of the TRM composites: carbon fiber textile impregnated by epoxy, carbon fiber textile coated with aluminum oxide powder following epoxy impregnation, and carbon fiber textile coated with aluminum oxide powder following both carbon fiber fabric attachment and epoxy impregnation. Three different lap splice lengths were used 180, 200, and 220 mm. In addition, the tensile properties of TRM composites following exposure to high temperature were investigated as well. In this test, TRM test specimens were exposed to two different temperature histories with maximum values of 250 and 350 °C. The results of the test specimens according to the test parameters were analyzed in terms of initial stiffness, cracking strength, corresponding strain at cracking, modulus of elasticity in the cracked stage, peak strength, and ultimate strain. The influence of lap splice length on the tensile behaviors of the TRM composites was analyzed and discussed. The surface treatment in the overlapping region showed ductile behavior and resulted in a significant improvement of the peak strength and ultimate strain over the untreated lap splice textile. Following exposure to high temperature, the TRM composites showed a reduction of tensile responses compared to those cured at room temperature. In addition, a prediction model developed in the previous study was used to predict the tensile behaviors of the lap-spliced carbon fiber-textile reinforced mortar composites exposed to high temperature, and the prediction by the model showed a good agreement with the experimental results.

The Analysis of Microstructure and the Properties of the Metallic-Matrix Composite on the Basis of the Copper and Aluminum Oxide

2015 ◽  
Vol 770 ◽  
pp. 151-155
Author(s):  
Aleksander S. Ivashutenko ◽  
Nikita V. Martyushev ◽  
E.M. Vodopyanov ◽  
Eugene P. Naiden
Keyword(s):  
Particle Size ◽  
Aluminum Oxide ◽  
Copper Powder ◽  
Pure Copper ◽  
Average Particle Size ◽  
Metallic Matrix ◽  
Oxide Powder ◽  
Average Particle ◽  
Aluminum Oxide Powder ◽  
Plasma Sintering

The article is devoted to the analysis of the possibilities to obtain gradient materials by the method of spark plasma sintering. Pure copper powders consisting of particles with the average particle size 100 microns and the nanodispersed powder of aluminum oxide were used in this study. Two powder compositions - pure copper powder and a mixture of copper powder and aluminum oxide powder were sintered:. As a result of the sintering process a sample with a double-area structure has been formed with a well-defined boundary between these areas. After sintering the copper powder porosity remained at the initial level. But having been mixed and sintered, the aluminum oxide powder particles agglomerated up to the average particle size of 80 – 100 microns.

Ultrafine aluminum oxide powder prepared by chemical vapor deposition of trimethylaluminum

1991 ◽  
Vol 13 (3) ◽  
pp. 199-205 ◽  
Author(s):  
Kwang Ho Kim ◽  
C. H. Ho ◽  
Tae-Gyo Suh ◽  
S. Prakash ◽  
R. F. Bunshah
Keyword(s):  
Chemical Vapor Deposition ◽  
Aluminum Oxide ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Oxide Powder ◽  
Aluminum Oxide Powder ◽  
Ultrafine Aluminum
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