International Journal of Refractory Metals and Hard Materials, ( ISI ), Volume (43), No (3), Year (2014-3) , Pages (13-18)

Title : ( Direct solid state synthesis ofW–Al2O3 nanostructured composite using ammonium paratungstate (APT) and Al powder mixture )

Authors: Maryam Sadat Marashi , Jalil Vahdati Khaki , Seyed Mojtaba Zebarjad ,

Access to full-text not allowed by authors

Citation: BibTeX | EndNote

Abstract

W–Al2O3 nanostructured composite has been produced by mechanical milling of ammonium paratungstate (APT) and Al powder mixture at room temperature. The milled products have been characterized by X-ray diffraction (XRD), and scanning electron microscopy (SEM) equipped with energy dispersive spectrometry (EDS). The XRD and EDS results confirmed that direct reduction of APT to α-W took place after 25 min milling. It was observed that α → β phase transition took place after 24 h mechanical milling. SEM micrographs showed that alumina matrix composite reinforced with W could be obtained by one step MSR (mechanically induced self-propagation reaction) process. X-ray diffraction peak broadening equation confirmed that the mean grain size of these particles was in nanometer range which gradually decreased with increasing the milling time.

Keywords

, Ammonium paratungstate Mechanical milling X, ray diffraction Scanning electron microscopy
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@article{paperid:1037384,
author = {Marashi, Maryam Sadat and Vahdati Khaki, Jalil and Zebarjad, Seyed Mojtaba},
title = {Direct solid state synthesis ofW–Al2O3 nanostructured composite using ammonium paratungstate (APT) and Al powder mixture},
journal = {International Journal of Refractory Metals and Hard Materials},
year = {2014},
volume = {43},
number = {3},
month = {March},
issn = {0263-4368},
pages = {13--18},
numpages = {5},
keywords = {Ammonium paratungstate Mechanical milling X-ray diffraction Scanning electron microscopy},
}

[Download]

%0 Journal Article
%T Direct solid state synthesis ofW–Al2O3 nanostructured composite using ammonium paratungstate (APT) and Al powder mixture
%A Marashi, Maryam Sadat
%A Vahdati Khaki, Jalil
%A Zebarjad, Seyed Mojtaba
%J International Journal of Refractory Metals and Hard Materials
%@ 0263-4368
%D 2014

[Download]