Mechanochemical synthesis of Al2O3-TiB2 nanocomposite powder from Al-TiO2-H3BO3 mixture

被引：38

作者：

Khaghani-Dehaghani, M. A. ^{[2
]}

Ebrahimi-Kahrizsangi, R. ^{[1
]}

Setoudeh, N. ^{[3
]}

Nasiri-Tabrizi, B. ^{[1
]}

机构：

[1] Islamic Azad Univ, Dept Mat Engn, Najafabad Branch, Esfahan, Iran

[2] Islamic Azad Univ, Dept Mat Engn, S Tehran Branch, Tehran, Iran

[3] Univ Yasuj, Dept Mat Engn, Yasuj, Iran

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2011年 / 29卷 / 02期

关键词：

Al2O3-TiB2; Nanocomposite; Mechanochemical; MSR reaction; MECHANICAL ACTIVATION; COMPOSITE; TITANIUM; AMORPHIZATION; CERAMICS; BEHAVIOR;

D O I：

10.1016/j.ijrmhm.2010.11.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Alumina-titanium diboride nanocomposite (Al2O3-TiB2) was produced using mixtures of titanium dioxide, acid boric and pure aluminum as raw materials via mechanochemical process. The phase transformation and structural characterization during mechanochemical process were utilized by X-ray diffractometry (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and thermogravimetric analyses (TG-DTA) techniques. A thermodynamic appraisal showed that the reaction between TiO2, B2O3 and Al is highly exothermic and should be self-sustaining. XRD analyses exhibited that the Al2O3-TiB2 nanocomposite was formed after 1.5 h milling time. The results indicate that increasing milling time up to 40 h had no significant effect other than refining the crystallite size. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：244 / 249

页数：6

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