Effect of ECAP on the Microstructure and Tensile Property of SiCp/AZ91 Magnesium Matrix Composite

2007 ◽  
pp. 1342-1345
Author(s):  
Hai Chang ◽  
Xiao Jun Wang ◽  
Ming Yi Zheng ◽  
Kun Wu
Keyword(s):  
Tensile Property ◽  
Matrix Composite ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix ◽  
Az91 Magnesium

Corrosion behavior of in situ (TiC-TiB2)p/AZ91 magnesium matrix composites in Harrison solution

2014 ◽  
Vol 61 (5) ◽  
pp. 319-327 ◽  
Author(s):  
Mohamed Gobara ◽  
Mohamed Shamekh
Keyword(s):  
Mechanical Properties ◽  
Corrosion Behavior ◽  
Matrix Composite ◽  
Electrochemical Impedance ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix ◽  
Content Type ◽  
X Ray ◽  
Az91 Magnesium

Purpose – This paper aims to study both the mechanical properties and the corrosion behavior of the synthesized in situ (TiC-TiB2) particulates/AZ91 magnesium matrix composite and compare the results with that of the conventional AZ91D alloy. Design/methodology/approach – Scanning electron microscope (SEM) equipped with energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) were used to study the surface morphology and crystalline structure. Mechanical compression tests were used to investigate the mechanical performance according to ASTM E9-89a. The corrosion behavior of the synthesized magnesium alloy was examined using both electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques in dilute Harrison solutions. Findings – The microstructure of the Mg composite showed a uniform distribution of reinforcing phases. Also, the reinforcing phases were formed without residual intermediate phases. The addition of titanium and boron carbides not only enhanced the mechanical properties of the matrix but also improve its corrosion behavior. Originality/value – This is the first time that magnesium matrix composite has been to synthesized with TiC and TiB2 particulates starting from starting from Ti and B carbides powder without adding aluminium using practical and low-cost technique (in situ reactive infiltration technique). This paper studies the corrosion behavior of synthesized Mg matrix in dilute Harrison solution and compares the results with that of conventional AZ91D.

Preparation and Performance of the Magnesium Matrix Composite Reinforced with Al2O3-SiO2 Short Fibers

2010 ◽  
Vol 139-141 ◽  
pp. 113-116
Author(s):  
Jun Tian ◽  
Wen Fang Li ◽  
Shou Yan Zhong ◽  
Ji Hua Peng
Keyword(s):  
Matrix Composite ◽  
Aluminum Phosphate ◽  
Aluminum Silicate ◽  
Reaction Products ◽  
Short Fibers ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix ◽  
Alloy Matrix ◽  
Infiltration Process ◽  
Az91 Magnesium

AZ91 magnesium matrix composite was fabricated by squeeze infiltration process. The aluminum silicate short fibers were used as reinforcement, and aluminum phosphate was adopted as binder, fabricating process was improved as well as reducing fabricating cost effectively. The optimum technique of squeeze casting, that was, preform-body temperature of 6600C, mould temperature of 5600C, pouring temperature of 7600C and pressure of 30~50MPa. The reaction products were investigated by optical microscopic, XRD and SEM. The results show that an ideal stronger interface is formed by the chemical reaction between magnesium alloy matrix and aluminum phosphate binder due to the produce of MgO particles and a little MgAl2O4 particles in the interface. AZ91 magnesium matrix composite is well-organized, and its grain size is significantly smaller than that of the matrix. The structure of AZ91 magnesium matrix composite is uniform without casting defects such as shrinkages and inclusions.

Microstructure and elevated tensile properties of submicron SiCp/AZ91 magnesium matrix composite

2012 ◽  
Vol 38 ◽  
pp. 110-114 ◽  
Author(s):  
Kunkun Deng ◽  
Cuiju Wang ◽  
Xiaojun Wang ◽  
Kun Wu ◽  
Mingyi Zheng
Keyword(s):  
Tensile Properties ◽  
Matrix Composite ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix ◽  
Az91 Magnesium
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