Synthesis of Al2O3 – ZrO2 nanocomposite By Mechanical Activated Self-propagating High-temperature Synthesis with thermal explosion mode

Asgharpour, Somaye; Vaezi, Mohammad Reza; Tayebifard, Ali

doi:10.30501/jamt.2010.70140

Synthesis of Al2O3 – ZrO2 nanocomposite By Mechanical Activated Self-propagating High-temperature Synthesis with thermal explosion mode

Authors

Somaye Asgharpour

Mohammad Reza Vaezi

Ali Tayebifard

Materials and Energy Research Center (MERC), Karaj, Iran

10.30501/jamt.2010.70140

Abstract

In this study nanocomposite of Al2O3-ZrO2 was produced by Mechanicaly Activated Self propagating High-temperature Synthesis (MASHS) using aluminium powder and industerial zirconia as inexpensive starting materials. To find the specifications of the products X-ray diffraction (XRD) and scanning electron microscopy(SEM) were used. The initial mixture with the ratio of Stoichiometry was milled for 1,3,6 and 9 hours. After 1hour of milling,sampels were capable of Synthesising in furnace at oxygen atmosphere. By Measuring the grains of synthesised phases showed that average size of the grains of product were 25 nm. By increasing milling time to 3 hours, the peaks of tetragonal zirconia in synthesised sampel were intensified more. By continuing the milling to 6 hours the phase of cubic zirconia was observed in synthesised sampels. and by 9 hours milling before synthesis ,phase changes and change in the composition in milling product was observed.

Keywords

Nanocomposite

Alumina

Zirconia

Mechanical activated Self propagating High-temperature Synthesis

Milling