Water Interaction and Its Effect on the Tribological Behavior of NAO Friction Materials ITT Friction Technologies

Format:

Book

Conference/Event

Author/Creator:

Iodice, Valentina, author.

Contributor:

Balestra, Simone

Durando, Pietro

Pellerej, Diego

Conference Name:

Brake Colloquium & Exhibition - 43rd Annual (2025-09-21 : Grand Rapids, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2025

Summary:

Moisture is known to be a relevant factor during a friction material life, affecting tribological behaviors such as friction coefficient and torque variations. In this study we investigated the interaction between friction materials and water; employing various techniques such as contact angle measurements, water adsorption, and exposure to controlled environmental condition changes.Focusing on NAO friction material, mix modifications were studied to highlight differences and understand mechanisms, in particular, organic content and hydrophobic agents, were examined.Characterization results showed that brake pads hydrophobicity can be influenced by water interaction conditions; even low-wettability surfaces, such as those treated with hydrophobic modifiers, can still absorb water depending on internal factors (e.g., porosity) and external conditions (e.g., contact time, humidity). Additionally, we investigated the capacity of a friction material to adsorb water and desorb it back to its initial state. Climatic chamber tests revealed that under high-humidity conditions, the differences between materials were minimized.Following this characterization, the materials were tested with Bruker UMT tribometer to assess how different conditioning treatments influence the tribological response, with particular emphasis on vibrations

Notes:

Vendor supplied data

Publisher Number:

2025-01-0336

Access Restriction:

Restricted for use by site license