Tribological investigation of cast iron air-conditioning compressor surfaces in CO2 refrigerant

Demas, Nicholaos G.; Polycarpou, Andreas A.

doi:10.1007/s11249-006-9094-8

Cited by 31 publications

(15 citation statements)

References 18 publications

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“…Iron carbonate films are believed to form and protect against adhesive wear [159]. Iron carbonate films are believed to form and protect against adhesive wear [159].…”

Section: Vapor Phase and Gas Lubricationmentioning

confidence: 99%

Boundary and Extreme Pressure Lubrication

2014

Engineering Tribology

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“…Iron carbonate films are believed to form and protect against adhesive wear [159]. Iron carbonate films are believed to form and protect against adhesive wear [159].…”

Section: Vapor Phase and Gas Lubricationmentioning

confidence: 99%

Boundary and Extreme Pressure Lubrication

2014

Engineering Tribology

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“…There was an investigation to compare the effects of R134a, carbon dioxide, nitrogen and oxygen environments within a non-lubricated condition as part of the tribological studies of the carbon dioxide environment. The result of these studies on a carbon dioxide environment showed a positive effect on surfaces due to the formation of a chemical film [10].…”

Section: Introductionmentioning

confidence: 96%

Friction and wear of the lubricated vane and roller materials in a carbon dioxide refrigerant

Jeon

Lee

2009

Wear

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“…Já em estudo realizado por Mello, Binder et al [11], foi mostrado que a presença de atmosfera protetiva (gás R600) modifica a estrutura química da tribocamada gerada no contracorpo reduzindo o coeficiente de atrito e a taxa de desgaste do par DLC/aço AISI 52100. Em outro trabalho realizado por Demas e Polycarpou [12] foram realizados testes do tipo pino-disco com amostras de ferro fundido cinzento, sem lubrificação e em diferentes atmosferas (O2, CO2, N2, Ar e R134a). Em atmosfera de O2 o desgaste é governado pela oxidação que ocorre na pista de desgaste, enquanto que em ar e R134a ela é acompanhada por uma componente adesiva.…”

Section: Introductionunclassified

Genese E Estabilidade De Tribocamadas Em Lubrificação Solida Caso Do Par Dlc–aço Inoxidável

Salvaro¹,

Silvério²,

Binder³

et al. 2018

ABM Proceedings

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ResumoA morfologia, dimensões e composição química de tribocamadas são fortemente dependentes das pressões e temperaturas existentes no contato e oriundas das reações das superfícies entre si, com a atmosfera, com os lubrificantes e contaminantes presentes no contato. No presente artigo foi analisada a formação de tribocamadas em pares DLCaço inoxidável testados por 180, 500, 1000 e 2500 horas em atmosfera de gás refrigerante R134a sem a presença de óleo lubrificante. A caracterização foi realizada por microscopia eletrônica de varredura espectroscopia de energia dispersiva (MEV-EDS) (morfologia e composição química) e interferometria ótica de luz branca (dimensões). Nas análises por MEV-EDS foram identificadas tribocamadas que se apresentaram mais pronunciadas nas superfícies do aço inoxidável sendo as mesmas oriundas de transferências mútuas entre os pares tribológicos bem como oxidação. A espessura das tribocamadas, por sua vez variou de 100 a 500 nm. Os resultados revelam que as tribocamadas são quimicamente estáveis e que suas espessuras não variam significativamente após mil horas de ensaio. Palavras-chave: Tribologia, tribocamada, Carbono tipo-diamante (DLC). GENESIS AND STABILITY OF TRIBOLAYERS IN SOLID LUBRICATION: CASE OF PAIR DLC-STAINLESS STEEL AbstractThe morphology, dimensions and chemical composition of tribolayers strongly depend on the pressures and temperatures acting on the contact. They are formed by reactions between the surfaces in contact with each other as well as with the atmosphere, lubricants and possible contaminants. In this paper the influence of test time (180, 500, 1000 and 2500 h) into the formation and characteristics of tribolayers in pairs DLC-stainless steel tested under refrigerant gas R134a atmosphere without presence of lubricating oil was analyzed. The characterization was performed using scanning electron microscopy, energy dispersive spectroscopy (SEM-EDS) (morphology and chemical composition) and white light interferometry (dimensions). The tribolayers thicknesses ranged from 100 to 500 nm and they were composed by elements originated from mutual transfers between the tribological pairs as well as oxides, being more pronounced on the stainless steel surface. The results show that the tribolayers are chemically stable (maintained the same composition over time) and the thickness remained stable after a thousand hours of testing.

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Tribological investigation of cast iron air-conditioning compressor surfaces in CO2 refrigerant

Cited by 31 publications

References 18 publications

Boundary and Extreme Pressure Lubrication

Boundary and Extreme Pressure Lubrication

Friction and wear of the lubricated vane and roller materials in a carbon dioxide refrigerant

Genese E Estabilidade De Tribocamadas Em Lubrificação Solida Caso Do Par Dlc–aço Inoxidável

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