In situ synthesis of nanocrystalline Al6063 matrix nanocomposite powder via reactive mechanical alloying

In this study, SiC – Al 2 O 3– Al ceramic matrix nanocomposite powder was successfully synthesized employing mechanical alloying technique, through mechanochemical reaction among Silicon dioxide (SiO2), Carbon (C) and Aluminum (Al). For the commercial purposes, the materials ( SiO 2, C and Al powders) and also the method of synthesis (mechanical alloying) is considered to be cost effective for the production of SiC – Al 2 O 3– Al nanocomposite. Addition of alumina ( Al 2 O 3) and aluminum to silicon carbide (SiC) in a nancomposite form can improve the fracture toughness, strength and fatigue crack resistance of SiC and make it a leading material for many commercial applications specially by considering the cost-effective method of production. The structural evaluation of powder particles after different milling times was conducted by X-ray diffractometry (XRD), and scanning electron microscopy (SEM). The results showed that during ball milling the SiO 2, C and Al reacted with a combustion mode producing SiC – Al 2 O 3– Al nanocomposite after 24 h ball milling and annealing at the temperature of 920°C. The crystallite sizes of phases remained in nanometric scale after annealing at 920°C for 1 h. Based on our investigation, it was revealed that ball milling and annealing process decreases the temperature of reaction between SiO 2 and C from 1500°C to 920°C.

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In-situ synthesis of AgCu/Cu2O nanocomposite by mechanical alloying: The effect of the processing on the thermal behavior

Thermochimica Acta ◽

10.1016/j.tca.2015.03.002 ◽

2015 ◽

Vol 606 ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Oana Gingu ◽

P. Rotaru ◽

A. Milea ◽

A. Marin ◽

C. Nicolicescu ◽

...

Keyword(s):

Mechanical Alloying ◽

Thermal Behavior ◽

In Situ Synthesis

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In situ synthesis of NbB2–Al2O3 nanocomposite powder by mechanochemical processing

Advances in Applied Ceramics ◽

10.1080/17436753.2017.1280241 ◽

2017 ◽

Vol 116 (3) ◽

pp. 173-179 ◽

Cited By ~ 1

Author(s):

E. Mohammad Sharifi

Keyword(s):

In Situ Synthesis ◽

Mechanochemical Processing ◽

Nanocomposite Powder

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Artificial Neural Network-Based Multiobjective Optimization of Mechanical Alloying Process for Synthesizing of Metal Matrix Nanocomposite Powder

Materials and Manufacturing Processes ◽

10.1080/10426914.2010.523917 ◽

2012 ◽

Vol 27 (1) ◽

pp. 33-42 ◽

Cited By ~ 8

Author(s):

M. R. Dashtbayazi

Keyword(s):

Neural Network ◽

Artificial Neural Network ◽

Multiobjective Optimization ◽

Mechanical Alloying ◽

Metal Matrix ◽

Nanocomposite Powder ◽

Metal Matrix Nanocomposite ◽

Artificial Neural ◽

Matrix Nanocomposite

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Mechanical Properties of AlMgB14 Prepared by Field-Activated, Pressure-Assisted Synthesis Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.217-219.2357 ◽

2012 ◽

Vol 217-219 ◽

pp. 2357-2361

Author(s):

Jian Xin Yan ◽

Wen Liu ◽

Wei Zhong Wen ◽

Ji Bing Li

Keyword(s):

Mechanical Properties ◽

Mechanical Alloying ◽

Average Density ◽

In Situ Synthesis ◽

High Yield ◽

Synthesis Process ◽

Fast Heating ◽

New Approach ◽

Heating Up

Mechanical alloying(MA) and field activated and pressure assisted synthesis(FAPAS) combining the method of in-situ synthesis were used for the preparing ultra-hard, super-abrasive AlMgB14metallic ceramic. AlMgB14was performed at 1500°C under a pressure of 60 MPa from the elemental constituents (aluminium, magnesium and boron (vacuum annealed 1500°C)). The sample was examined by SEM, EDS and XRD. The products contained uniform AlMgB14. The hardness of AlMgB14prepared under these conditions is 27.2-32.5GPa, the average density is 2.62g/cm3and the fracture toughness is 3MPam1/2.These values are in correspond to the hardness of AlMgB14prepared by mechanical alloying/hot uniaxial pressing (28-35GPa). Analysis of the mechanisms of fracture,the fracture surface of AlMgB14sintered at 1500°C is of transgranularfracture. A new approach is brought forward by the mechanical alloying assisted FAPAS process (MA-FAPAS) to have synthesized AlMgB14 with fast heating-up, efficiency, energy saving and high yield.

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