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contributor authorK. Y. Lee
contributor authorR. Wei
date accessioned2017-05-09T00:21:37Z
date available2017-05-09T00:21:37Z
date copyrightOctober, 2006
date issued2006
identifier issn0742-4787
identifier otherJOTRE9-28744#711_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/134664
description abstractCeramic seals are widely used in many severe applications such as in corrosive, high temperature and highly loaded situations especially in hot chemical water-based extreme environments for automobile water pumps. Presently, polymeric materials are used as the counter part for alumina ceramic seals to reduce the ceramic-to-ceramic wear. As a result, leaks are very commonly observed from water pump during services. Consequently, it is needed to improve the surface properties of the ceramic seals using a surface modification technique such as a thin film coating process to meet the increasing demand of more stability, more durability, and lower friction of coefficient in those extreme environments. To meet these challenges, we have applied DLC (diamond-like carbon) coatings on alumina using a PIID (plasma immersion ion deposition) technique intended for seal applications. The DLC-coated specimens were tested under a wide range of temperature conditions, from room temperature up to 400°C, using a high temperature pin-on-disk tribo-tester. After that, the wear-tested specimens were analyzed using SEM with EDS to characterize the worn surfaces. Morphological changes of the DLC coated surfaces before and after the wear tests were studied. Under certain deposition conditions DLC performed very well up to 400°C. However, under other conditions, DLC failed catastrophically. In this paper we will present the friction and wear characteristics of the DLC-coated alumina. Finally, we will discuss the failure mode of DLC coatings.
publisherThe American Society of Mechanical Engineers (ASME)
titleTribological Characteristics of DLC-Coated Alumina at High Temperatures
typeJournal Paper
journal volume128
journal issue4
journal titleJournal of Tribology
identifier doi10.1115/1.2345395
journal fristpage711
journal lastpage717
identifier eissn1528-8897
keywordsTribology
keywordsFriction
keywordsWear
keywordsTemperature
keywordsCoating processes
keywordsCoatings
keywordsCeramics
keywordsDisks
keywordsFailure
keywordsHigh temperature
keywordsDiamonds
keywordsPlasmas (Ionized gases)
keywordsWear testing
keywordsCarbon
keywordsWater
keywordsPumps
keywordsSurface properties
keywordsAutomobiles AND Leakage
treeJournal of Tribology:;2006:;volume( 128 ):;issue: 004
contenttypeFulltext


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