Ternary Oxide Structures for High Temperature Lubrication

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In this research, a temperature dependent tribological investigation of selected ternary oxides was undertaken. Based on the promising results of previous studies on silver based ternary oxides, copper based ternary oxides were selected to conduct a comparative study since both copper and silver are located in the same group in the periodic table of the elements. Two methods were used to create ternary oxides: (i) solid chemical synthesis to create powders and (ii) sputtering to produce thin films. X-ray diffraction was used to explore the evolution of phases, chemical properties, and structural properties of the coatings before and after tribotesting. ... continued below

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ix, 64 pages : illustrations (some color)

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Gu, Jingjing August 2015.

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This thesis is part of the collection entitled: UNT Theses and Dissertations and was provided by UNT Libraries to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 24 times . More information about this thesis can be viewed below.

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  • Gu, Jingjing

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Description

In this research, a temperature dependent tribological investigation of selected ternary oxides was undertaken. Based on the promising results of previous studies on silver based ternary oxides, copper based ternary oxides were selected to conduct a comparative study since both copper and silver are located in the same group in the periodic table of the elements. Two methods were used to create ternary oxides: (i) solid chemical synthesis to create powders and (ii) sputtering to produce thin films. X-ray diffraction was used to explore the evolution of phases, chemical properties, and structural properties of the coatings before and after tribotesting. Scanning electron microscopy, Auger scanning nanoprobe spectroscopy, and X-ray photoelectron spectroscopy were used to investigate the chemical and morphological properties of these materials after sliding tests. These techniques revealed that chameleon coatings of copper ternary oxides produce a friction coefficient of 0.23 when wear tested at 430 °C. The low friction is due to the formation of copper tantalate phase and copper in the coatings. All sputtering coatings showed similar tribological properties up to 430 °C.

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ix, 64 pages : illustrations (some color)

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  • August 2015

Added to The UNT Digital Library

  • March 4, 2016, 4:14 p.m.

Description Last Updated

  • April 10, 2017, 9:19 a.m.

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Gu, Jingjing. Ternary Oxide Structures for High Temperature Lubrication, thesis, August 2015; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc804963/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .