Products tagged with 'brakes'

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Optimized Hardness Measurements for Micrometric Coatings in Disc Brake Components

Product Number: 51324-20993-SG

Author: Carlotta Carrubba; Andrea Bonfanti; Nicola Nocera; Federico Bertasi; Alessandro Mancini

Publication Date: 2024

$40.00

The manuscript describes an optimized analytical protocol for the measurement of hardness and Young’s modulus in micrometric Sol-Gel coatings for brake components. In particular, two different hybrid organic-inorganic coatings with different functional properties are presented as example. The work pays particular attention in developing and optimizing reliable hardness measurements procedures by coupling Focus Ion Beam Scanning Electron Microscopy (FIB-SEM) and Nano-Indentation (NI) probes. In particular, FIB-SEM is used to directly assess the actual coating thickness, avoiding any eventual damaging and artifact in thin layers possibly due to classical metallographic sample preparation. Once the thickness of the investigated coating is determined, then it is used as input parameter to calculate proper indentation penetration depth and load for NI measurements, thus avoiding any influence of the substrate in the obtained results. Finally, it is demonstrated that the proposed analytical protocol provides stable, reproducible and reliable hardness measurements in thin Sol-Gel coatings.

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Optimizing Sol-Gel Coatings for Corrosion Protection of Braking Discs

Product Number: 51323-18872-SG

Author: Nicola Nocera, Bozhena Tsyupa, Marco Bandiera, Mary Angel Abello, Pietro Della Bella, Alessandro Piglione, Andrea Bonfanti, Federico Bertasi

Publication Date: 2023

$20.00

As far as the automotive sector is concerned, braking discs (BDs) are objects usually made of Grey Cast-Iron (GCI), i.e. a material exhibiting overall good mechanical properties and castability, but poor corrosion resistance. In particular, looking at the standard working conditions of a disc brake system, several environmental factors can cause and enhance GCI corrosion phenomena, such as: i) atmospheric moisture; i) ionic species contained in aerosols (e.g., chlorides and sulfates); iii) air differential corrosion caused by discs surface soiling by mud or other materials; and iv) galvanic coupling between the rotor and the braking pads.

Products tagged with 'brakes'

Optimized Hardness Measurements for Micrometric Coatings in Disc Brake Components

Optimizing Sol-Gel Coatings for Corrosion Protection of Braking Discs

Association for Materials Protection and Performance