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Effect of cryogenic aging and test-environment on the tribological and mechanical properties of PEEK composites
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements. CEMMPRE, Department of Mechanical Engineering, University of Coimbra, Portugal.ORCID iD: 0000-0002-8025-5104
CEMMPRE, Department of Mechanical Engineering, University of Coimbra, Portugal.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-8676-8819
2024 (English)In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 194, article id 109554Article in journal (Refereed) Published
Abstract [en]

This study investigated mechanical and tribological properties of polyetheretherketone (PEEK) and PEEK composites, before and after aging in liquid nitrogen for 5 months. Tribological tests conducted at 25 °C and at − 100 °C in air and in high vacuum (10−5 Pa) environment revealed the effect of matrix modification, fillers, environment, temperature, and cryogenic aging on their performances. Cryogenic aging of the polymers resulted in cryogenic embrittlement and decrease of the fracture toughness by around 10% and increase of wear rate by at least 20%. Very low coefficient of friction (0.02) was achieved in cryogenic vacuum environment for carbon fiber, graphite, and PTFE reinforced PEEK. The results indicate the significant impact of aging, temperature and environment on PEEK and its composites.

Place, publisher, year, edition, pages
Elsevier Ltd , 2024. Vol. 194, article id 109554
Keywords [en]
Cryogenic aging, PEEK composite, Tribology, Vacuum
National Category
Mechanical Engineering
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-104894DOI: 10.1016/j.triboint.2024.109554Scopus ID: 2-s2.0-85187960018OAI: oai:DiVA.org:ltu-104894DiVA, id: diva2:1846945
Note

Validerad;2024;Nivå 2;2024-04-05 (marisr);

Full text license: CC BY

Available from: 2024-03-26 Created: 2024-03-26 Last updated: 2024-05-27Bibliographically approved
In thesis
1. Tribological and Mechanical Performance of Thermoplastic Composites: Effect of Cryogenic Aging and Testing-Environment
Open this publication in new window or tab >>Tribological and Mechanical Performance of Thermoplastic Composites: Effect of Cryogenic Aging and Testing-Environment
2024 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2024
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
urn:nbn:se:ltu:diva-105597 (URN)978-91-8048-589-0 (ISBN)978-91-8048-590-6 (ISBN)
Public defence
2024-09-03, Luleå University of Technology, Luleå, 10:00 (English)
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Supervisors
Available from: 2024-05-27 Created: 2024-05-27 Last updated: 2024-05-27Bibliographically approved

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Nikonovich, MaksimEmami, Nazanin

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