Effect of high entropy particle on aerospace-grade aluminium composite developed through combined mechanical supersonic vibration and squeeze infiltration technique

2022 ◽  
Vol 74 ◽  
pp. 383-399
Author(s):  
Vasanthakumar Pandian ◽  
Sekar Kannan
Keyword(s):  
Aluminium Composite ◽  
High Entropy ◽  
Squeeze Infiltration ◽  
Infiltration Technique

Development of Al 319-Micro Silica Metallic Composite by Squeeze Infiltration Technique

2015 ◽  
Vol 830-831 ◽  
pp. 489-492 ◽  
Author(s):  
K.M. Sree Manu ◽  
P.S. Rahul ◽  
L. Ajay Raag ◽  
T.P.D. Rajan ◽  
M Brahmakumar ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Porous Ceramic ◽  
Ceramic Composites ◽  
Pore Former ◽  
Squeeze Pressure ◽  
Squeeze Infiltration ◽  
Ceramic Preform ◽  
Infiltration Technique ◽  
Temperature Liquid ◽  
Micro Silica

The objective of present investigation is to synthesize porous micro silica based ceramic preform with varying composition of particles using burn out technique and processing of Al-Micro silica metal-ceramic composites by squeeze infiltration method. Direct squeeze infiltration of 319 aluminum alloy on micro silica preform is successfully carried out with the controlled process parameters of initial preform temperature, liquid metal superheat, squeeze pressure and its rate of application, and die temperature. The preform and composites are characterized using optical microscopy, electron microscopy, hardness and compression strength testing. Porous ceramic preform with more than 70% porosity has been fabricated by PEG as pore former. The infiltrated composite have shown uniform and complete infiltration of aluminum alloy in between micro silica particles.

FABRICATION AND RESIDUAL STRESS CHARACTERIZATION OF SQUEEZE INFILTRATED Al18B4O33/Mg FUNCTIONALLY GRADED MATERIAL

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1485-1490
Author(s):  
WOOK JIN LEE ◽  
JUN SEONG YANG ◽  
YONG HA PARK ◽  
BONG GYU PARK ◽  
IK MIN PARK ◽  
...  
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
Numerical Models ◽  
Functionally Graded ◽  
Mechanical Parameters ◽  
Squeeze Infiltration ◽  
Graded Material ◽  
Infiltration Technique

In this study, three types of functionally graded Al 18 B 4 O 33/ Mg composites which consisted of 2, 3 and 4 layers and where volume fractions of Al 18 B 4 O 33 were gradually changing from 0 to 35% were fabricated using squeeze infiltration technique. The mechanical parameters of each layer were measured for the analysis of residual stress. Elastic finite element numerical models were applied to the analysis of thermal residual stress. The analytic results showed that the residual stresses were significantly decreased in the macrointerface with increasing the number of layer.

Fabrication and Characterization of AZ91/CNT Magnesium Matrix Composites

2009 ◽  
Vol 620-622 ◽  
pp. 271-274 ◽  
Author(s):  
Yong Ha Park ◽  
Yong Ho Park ◽  
Ik Min Park ◽  
Jeong Jung Oak ◽  
Hisamichi Kimura ◽  
...  
Keyword(s):  
Magnesium Alloys ◽  
High Strength ◽  
Matrix Composites ◽  
Wear Properties ◽  
Magnesium Matrix ◽  
Magnesium Matrix Composites ◽  
Squeeze Infiltration ◽  
Infiltration Technique ◽  
Matrix Reinforcement ◽  
Carbon Nano Tube

Carbon Nano Tube (CNT) reinforced AZ91 metal matrix composites (MMC) were fabricated by the squeeze infiltrated method. Properties of magnesium alloys have been improved by impurity reduction, surface treatment and alloy design, and thus the usage for the magnesium alloys has been extended recently. However there still remain barriers for the adaption of magnesium alloys for engineering materials. In this study, we report light-weight, high strength heat resistant magnesium matrix composites. Microstructural study and tensile test were performed for the squeeze infiltrated magnesium matrix composites. The wear properties were characterized and the possibility for the application to automotive power train and engine parts was investigated. It was found that the squeeze infiltration technique is a proper method to fabricate magnesium matrix composites reducing casting defects such as pores and matrix/reinforcement interface separation etc. Improved tensile and mechanical properties were obtained with CNT reinforcing magnesium alloys

Laser assisted machining of aluminium composite reinforced by SiC particle

2008 ◽  
Author(s):  
M. Kawalec ◽  
D. Przestacki ◽  
K. Bartkowiak ◽  
M. Jankowiak
Keyword(s):  
Aluminium Composite ◽  
Laser Assisted Machining ◽  
Sic Particle

Layered High-Entropy Oxide Structures for Reversible Energy Storage

2020 ◽  
Author(s):  
Junbo Wang ◽  
Yanyan Cui ◽  
Qingsong Wang ◽  
Kai Wang ◽  
Xiaohui Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Cathode Material ◽  
Spray Pyrolysis ◽  
Lattice Structure ◽  
Oxide Materials ◽  
High Entropy ◽  
New Class ◽  
Nebulized Spray Pyrolysis

<p>Layered Li<i><sub>x</sub></i>MO<sub>2</sub> materials, a new class of high-entropy oxides, have been synthesized by nebulized spray pyrolysis. Specifically, the lattice structure of Li(Ni<sub>1/3</sub>Mn<sub>1/3</sub>Co<sub>1/3</sub>)O<sub>2</sub> (NCM111) cathode material has been replicated successfully while increasing the number of cations in equimolar proportions, thereby allowing transition to high-entropy oxide materials.</p>

High-Entropy Alloys as Catalysts for the CO2 and CO Reduction Reactions

2019 ◽  
Author(s):  
Jack Pedersen ◽  
Thomas Batchelor ◽  
Alexander Bagger ◽  
Jan Rossmeisl
Keyword(s):  
Density Functional ◽  
Rational Design ◽  
Hydrogen Adsorption ◽  
Co Adsorption ◽  
Reduction Reaction ◽  
Supervised Machine Learning ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Co Reduction ◽  
Disordered Alloy

Using the high-entropy alloys (HEAs) CoCuGaNiZn and AgAuCuPdPt as starting points we provide a framework for tuning the composition of disordered multi-metallic alloys to control the selectivity and activity of the reduction of carbon dioxide (CO2) to highly reduced compounds. By combining density functional theory (DFT) with supervised machine learning we predicted the CO and hydrogen (H) adsorption energies of all surface sites on the (111) surface of the two HEAs. This allowed an optimization for the HEA compositions with increased likelihood for sites with weak hydrogen adsorption{to suppress the formation of molecular hydrogen (H2) and with strong CO adsorption to favor the reduction of CO. This led to the discovery of several disordered alloy catalyst candidates for which selectivity towards highly reduced carbon compounds is expected, as well as insights into the rational design of disordered alloy catalysts for the CO2 and CO reduction reaction.

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