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Impact of test-envi...
Impact of test-environment and cryogenic aging on mechanical properties and tribological performance of PI-based materials
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- Nikonovich, Maksim (författare)
- Luleå tekniska universitet,Maskinelement,CEMMPRE, Department of Mechanical Engineering, University of Coimbra, Portugal
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- Ramalho, Amilcar (författare)
- CEMMPRE, Department of Mechanical Engineering, University of Coimbra, Portugal
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- Emami, Nazanin (författare)
- Luleå tekniska universitet,Maskinelement
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(creator_code:org_t)
- Engelska.
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- This study investigates the effect of test-environment, temperature, and cryogenic aging in liquid nitrogen for 5 months on mechanical and tribological performance of polyimide (PI) and PI composites. Tribological tests were conducted at 25 °C in air, and at both 25 °C and -100 °C in a high vacuum (10-5 Pa) environment. Impact of cryogenic aging, testing condition on PI-based materials varied depending on the polymer structure and composition. Cryogenic aging led to embrittlement, increasing the coefficient of friction and wear rate up to 77% and 165%, respectively. Some polyimides exhibited the lowest coefficient of friction (0.04) in vacuum at 25°C, while the temperature reduction to -100 oC in vacuum generally decreased the tribological performance, increased contact stresses and abrasive wear of the materials.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Tribologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Tribology (hsv//eng)
Nyckelord
- polyimide
- vacuum
- cryogenic temperature
- cryogenic aging
Publikations- och innehållstyp
- vet (ämneskategori)
- ovr (ämneskategori)