Physicochemical Aspects of the Work of Passenger Car Brake Linings. Part 2. The Effect of Lubricating Additives

Szlichting, Maciej; Bieliński, Dariusz M.; Rogowski, Jacek; Kozanecki, Marcin; Dąbrowski, Tomasz

doi:10.5604/01.3001.0016.1043

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Tytuł artykułu

Physicochemical Aspects of the Work of Passenger Car Brake Linings. Part 2. The Effect of Lubricating Additives

Autorzy

Szlichting Maciej , Bieliński Dariusz M. , Rogowski Jacek , Kozanecki Marcin , Dąbrowski Tomasz

Treść / Zawartość

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Identyfikatory

DOI

10.5604/01.3001.0016.1043

Warianty tytułu

Fizykochemiczne aspekty pracy okładzin hamulcowych samochodów osobowych. Cz. 2. Wpływ dodatków smarnych

Języki publikacji

Abstrakty

The paper presents the influence of various systems of lubricating additives which determine the performance of the friction materials of brake linings. The base hybrid friction material formulation was modified with various types of lubricating additives. These additives are divided into groups containing commonly used lubricating materials: carbons and sulphides, compounded in various proportions, influencing the formation and structure of the so-called third body layer (TBL) on the surface of the brake disc because of braking. Raman Spectroscopy (RS), time of flight Secondary Ion Mass Spectroscopy (ToF-SIMS) and high-resolution scanning electron microscopy with an X-ray analyser (SEM-EDS) equipped with a focus ion beam (FIB) were used for chemical and morphological analysis of the surface layer of brake disc after breaking tests. The results of the physicochemical analysis of TBL were correlated with the results of tribological tests (according to the SAE-J2522 procedure, commonly known as AK-Master) on a brake dynamometer adapted to the measurements of acoustic signals (NVH – noise, vibration, and harshness). The obtained results confirm the important role played by the so-called third body layer, formed on the surface of the brake disc for safety (COF), durability (wear of friction elements) and the acoustic spectrum accompanying braking.

W pracy przedstawiono wpływ różnych układów lubrykantów, które decydują o właściwościach materiałów ciernych okładzin hamulcowych. Referencyjny hybrydowy materiał cierny zmodyfikowano różnymi rodzajami smarów stałych. Dodatki te dzielą się na grupy zawierające powszechnie stosowane materiały smarne: węgle i siarczki, mieszane w różnych proporcjach, mających wpływ na tworzenie się i strukturę tzw. warstwy trzeciego ciała (TBL) na powierzchni tarczy hamulcowej w wyniku hamowania. Do analizy chemicznej i morfologicznej powierzchni tarczy hamulcowej po testach hamowania wykorzystano odpowiednio spektroskopię Ramana (RS), spektroskopię masową jonów wtórnych (ToF-SIMS) oraz skaningową mikroskopię elektronową o wysokiej rozdzielczości z analizatorem rentgenowskim (SEM-EDS), wyposażoną w skupioną wiązkę jonów (FIB). Wyniki analizy fizykochemicznej TBL skorelowano z wynikami dynanometrycznych badań tribologicznych (zgodnie z procedurą SAE-J2522, popularnie nazywaną AK-Master) oraz widmami akustycznymi (NVH – hałas, drgania i złożoność sygnału). Uzyskane wyniki potwierdzają istotną rolę, jaką odgrywa warstwa tzw. trzeciego ciała, formująca się na powierzchni tarczy hamulcowej dla bezpieczeństwa (COF), trwałości (zużycie elementów ciernych) oraz widma akustycznego towarzyszącego hamowaniu.

Słowa kluczowe

brake linings lubricants third body surface friction wear acoustic effect

okładziny hamulcowe dodatki smarne trzecie ciało powierzchnia tarcie zużycie efekt akustyczny

Wydawca

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Czasopismo

Tribologia

Rocznik

2022

Tom

nr 3

Strony

121--136

Opis fizyczny

Bibliogr. 50 poz., rys., tab., wykr.

Twórcy

autor

Szlichting Maciej

TOMEX Brakes Ltd. partnership, Budzyn, Poland

autor

Bieliński Dariusz M.

Institute of Polymer & Dye Technology, Faculty of Chemistry, Lodz University of Technology, Lodz, Poland

https://orcid.org/0000-0003-0675-4594

autor

Rogowski Jacek

Institute of Organic & Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, Lodz, Poland

https://orcid.org/0000-0001-8095-336X

autor

Kozanecki Marcin

Department of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Lodz, Poland

https://orcid.org/0000-0001-7400-6315

autor

Dąbrowski Tomasz

BOSMAL Automotive Research and Development Institute Ltd., Mechanical Testing Laboratory, Bielsko-Biala, Poland

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).

Typ dokumentu

Bibliografia

Identyfikator YADDA

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