Corrosion and Erosion Studies of Ceramic Matrix Composites

Key words: ceramic matrix composite, silicon carbide, magnesium, wear, abrasion INTRODUCTION Inorganic composite materials have the potential to combine the favorable properties of metals and ceramics; however, machining issues and high production costs usually render them unfavorable in the materia...

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Published inNACE International Corrosion Conference Proceedings pp. 1 - 8
Main Authors Diaz, Joshua, Swartzbaugh, Spencer, Ravi, Vilupanur
Format Conference Proceeding
LanguageEnglish
Published Houston NACE International 01.07.2020
Subjects
Abrasion
Abrasive wear
Aluminum alloys
Aluminum base alloys
Aluminum oxide
Ceramic matrix composites
Ceramics
Composite materials
Corrosion potential
Diffusion layers
Discount coupons
Machining
Magnesium
Magnesium oxide
Materials selection
Optical microscopy
Particulates
Production costs
Reaction products
Scanning electron microscopy
Silicon carbide
Spectrum analysis
Steel alloys
Surface finish
Test methods
Wear resistance
Wetting
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Summary:Key words: ceramic matrix composite, silicon carbide, magnesium, wear, abrasion INTRODUCTION Inorganic composite materials have the potential to combine the favorable properties of metals and ceramics; however, machining issues and high production costs usually render them unfavorable in the materials selection process. According to a study done by Nagelberg, the growth mechanism is a multistep process involving the diffusion of MgAhO4 through an oxygen-permeable MgO layer2,3. The magnesium added to the aluminum alloy supports the formation of the external MgO layer and is key to facilitating and accelerating the wetting of the reaction product (AhO3) by the molten aluminum alloy.2,3 In Zhang et al, the metallic silicon was found to act as a lubricant whereas the hard alumina matrix and SiC particulates resistant pin-on-disk wear.3 Further electrochemical and abrasive analysis on these composites for applications involving slurry transport and pumping should be explored. Test coupons were metallographically prepared to a 0.05 pm surface finish and analyzed using optical microscopy, scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS).