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- W2039331070 abstract "This paper examines the correlation between mechanical properties and the density, phase and hydrogen content of deposited alumina layers, and compares them to those of sapphire and amorphous alumina synthesized through ion-beam irradiation of sapphire. Alumina films were deposited using electron beam evaporation of aluminum and co-bombardment with O 2 + ions (30–230 eV) from an electron–cyclotron resonance (ECR) plasma. The H content and phase were controlled by varying the deposition temperature and the ion energy. Sapphire was amorphized at 84 K by irradiation with Al and O ions (in stoichiometric ratio) to a defect level of 4 dpa in order to form an amorphous layer 370 nm thick. Nanoindentation was performed to determine the elastic modulus, yield strength and hardness of all materials. Sapphire and amorphized sapphire have a higher density and exhibit superior mechanical properties in comparison to the deposited alumina films. Density was determined to be the primary factor affecting the mechanical properties, which showed only a weak correlation to the hydrogen content." @default.
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- W2039331070 date "2000-05-01" @default.
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- W2039331070 title "The mechanical properties of alumina films formed by plasma deposition and by ion irradiation of sapphire" @default.
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- W2039331070 doi "https://doi.org/10.1016/s0168-583x(99)00648-5" @default.
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