Synthesis, microstructure evolution, and mechanical properties of (Cr1–xVx)2AlC ceramics by in situ hot-pressing method

2014 ◽  
Vol 29 (10) ◽  
pp. 1168-1174 ◽  
Author(s):  
Jianfeng Zhu ◽  
Hao Jiang ◽  
Fen Wang ◽  
Qi Ma
Keyword(s):  
Mechanical Properties ◽  
Microstructure Evolution ◽  
Hot Pressing ◽  
Pressing Method ◽  
Image Position

Abstract

Physical and Mechanical Properties of Bulk Ta4AlC3Ceramic Prepared by an In Situ Reaction Synthesis/Hot-Pressing Method

2007 ◽  
Vol 90 (8) ◽  
pp. 2542-2548 ◽  
Author(s):  
Chunfeng Hu ◽  
Zhijun Lin ◽  
Lingfeng He ◽  
Yiwang Bao ◽  
Jingyang Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
Physical And Mechanical Properties ◽  
Reaction Synthesis ◽  
Pressing Method ◽  
In Situ Reaction

Microstructure and Mechanical Properties of Al2O3/TiAl In Situ Composites Doped with Fe2O3

2011 ◽  
Vol 675-677 ◽  
pp. 597-600
Author(s):  
Liu Yi Xiang ◽  
Fen Wang ◽  
Jian Feng Zhu ◽  
Xiao Feng Wang
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Flexural Strength ◽  
Hot Pressing ◽  
Rockwell Hardness ◽  
Powder Mixtures ◽  
Pressing Method ◽  
Fe2o3 Content ◽  
Maximum Value

Al2O3/TiAl in situ composites were successfully prepared by vacuum hot-pressing method with elemental powder mixtures of Ti, Al, TiO2 and Fe2O3. The effect of Fe2O3 addition on the microstructures and mechanical properties of Al2O3/TiAl composites has been investigated. The results show that the Rockwell hardness, flexural strength and fracture toughness of the composites increase with increasing Fe2O3 content. When the Fe2O3 content is 0.84 wt %, the flexural strength and the fracture toughness reach the maximum value of 624 MPa and 6.63 MPa·m1/2, respectively. The improvement of mechanical properties is firstly associated with a more homogeneous and finer microstructure developed by addition of Fe2O3; secondly, it is related to the increase of the ratio of α2-Ti3Al/γ- TiAl matrix phases.

scholarly journals Microstructure and Mechanical Properties of Multiphase Strengthened Al/Si/Al2O3/SiO2/MWCNTs Nanocomposites Sintered byIn SituVacuum Hot Pressing

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Jingrui Li ◽  
Xiaosong Jiang ◽  
Zhenyi Shao ◽  
Degui Zhu ◽  
Shardai S. Johnson ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
Fracture Mechanisms ◽  
Multiwalled Carbon ◽  
Pressing Method ◽  
Casting Alloys ◽  
Microstructure And Mechanical Properties ◽  
Low Thermal Expansion ◽  
Matrix Nanocomposites

Eutectic Al–Si binary alloy is technically one of the most important Al casting alloys due to its high corrosion resistance, evident shrinkage reduction, low thermal expansion coefficient, high fluidity, and good weldability. In this work, multiphased Al–Si matrix nanocomposites reinforced with Al2O3and multiwalled carbon nanotubes (MWCNTs) have been sintered by anin situvacuum hot-pressing method. The alumina Al2O3nanoparticles were introduced by anin situreaction of Al with SiO2. Microstructure and mechanical properties of the sintered Al/Si/Al2O3/SiO2/MWCNTs nanocomposites with different alumina contents were investigated. The mechanical properties were determined by micro-Vickers hardness and compressive and shear strength tests. The results demonstrated thatin situalumina and MWCNTs had impacts on microstructure and mechanical properties of the nanocomposites. Based on the mechanical properties and microstructure of the nanocomposites, strengthening and fracture mechanisms by multiple reinforcements were analyzed.

scholarly journals An Experimental Study Of Aluminum Alloy Matrix Composite Reinforced SiC Made By Hot Pressing Method

2015 ◽  
Vol 60 (2) ◽  
pp. 1523-1527 ◽  
Author(s):  
M. Suśniak ◽  
J. Karwan-Baczewska ◽  
J. Dutkiewicz ◽  
M. Actis Grande ◽  
M. Rosso
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Matrix Composite ◽  
Hot Pressing ◽  
Metallic Matrix ◽  
High Energy ◽  
Composite Powders ◽  
Alloy Matrix ◽  
Pressing Method ◽  
Sic Particles

Abstract The present work investigates the possibility of using powder metallurgy processing for producing a metal matrix composite. Materials were prepared from AlSi5Cu2 chips with reinforcement of 10, 15, 20 wt. % silicon carbide. Aluminum alloy chips were milled with SiC powder in a high-energy ball mill by 40 hours. Mechanical alloying process lead to obtain an uniform distribution of hard SiC particles in the metallic matrix and refine the grain size. The consolidation of composite powders was performed by vacuum hot pressing at 450°C, under pressure of 600 MPa by 10 min. The results shows that the addition of SiC particles has a substantial influence on the microstructure and mechanical properties of composite powder as well as consolidated material. Hot pressing is an effective consolidation method which leads to obtain dense AlSi5Cu2/SiC composite with homogeneous structure and advanced mechanical properties.

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