A STUDY FOR SOME OF MECHANICAL PROPERTIES OF AL2O3 CERAMIC THIN FILM PREPARED BY SPRAY PYROLYSIS  METHOD

A. Abdul-Hamead, Dr.Alaa; S.h, Dr.Mohammd

	A STUDY FOR SOME OF MECHANICAL PROPERTIES OF AL2O3 CERAMIC THIN FILM PREPARED BY SPRAY PYROLYSIS METHOD
Iraqi journal of mechanical and material engineering
Article 1, Volume 10, Issue 2, 2010, Pages 290-303
Authors
Dr.Alaa A. Abdul-Hamead; Dr.Mohammd s.h
Abstract
In the present work Al2O3 thin film has been deposited on glass and stainless steel 304 substrate by spray pyrolysis technique. Al2O3 was deposited with different three element(Al, Fe ,Cu) for five different percentages(1,2,3,4,5 wt %), the film was test by XRD measurements , and the topography of the films has been tested by using optical microscope, also measuring open porosity ,and Apparent density was calculated. Some of mechanical characteristics have been studied (microhardness, wear resistance). The results of XRD show that the film was crystalline with α- Al2O3 phase and grain size was 60 nm and stress ratio was 0.027%. Apparent density was 2 g/cm3 for pure Al2O3 film to 3.1g/cm3 for 5 wt% of Fe ,and open porosity was 2pore/cm2.The testes were proved that the mechanical properties results were improved after doping specially with Fe. The microhardness of the films has been improved after doping from 1346.9 Kg/mm2 for pure Al2O3 film to 1648.3 Kg/mm2 for 5 wt% of Fe on glass, and from 1413.1 Kg/mm2 to 1947.5 Kg/mm2 on stainless steel 304.Also wear resistant has been improved for the films that deposited after doping from 5.6810-9 g/cm2 for pure Al2O3 to 3.03 10-9 g/cm2 for 5 wt% of Fe.
Keywords
spray pyrolysis; film; Microhardness; wear resistant; ceramic film

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