Banca de DEFESA: MICAEL GONÇALVES MULLER

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MICAEL GONÇALVES MULLER
DATE: 14/12/2023
TIME: 14:30
LOCAL: Campus Feliz (defesa online: meet.google.com/oxa-qoag-wmb)
TITLE:

EVALUATION OF TRIBOLOGICAL AND PHYSICAL PROPERTIES FOR REDUCING SPARKS OF FRICTION MATERIAL APPLIED TO AUTOMOTIVE BRAKES

KEY WORDS:

Oxidized Polyacrylonitrile, Zinc Borate, Brake Pad and Spark.

PAGES: 65
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
SPECIALTY: Materiais Conjugados Não-Metálicos
SUMMARY:

Currently, several researches related to binder materials, friction modifiers and mechanical reinforcements have been conducted, and also new studies related to fibers and functional fillers are being explored in the friction material industry. However, optimising frictional properties is a complex task given the high performance required and the reduced levels of wear and low aggression to the brake disc. These complexities increase when factors such as heating of the brake system and generation of sparks during the braking process need to be minimized due to severe applications to which the system is submitted. In this field, studies have been conducted in order to identify these factors and which materials can mitigate or eliminate the generation of sparks and, in some moments, the ignition of the materials. In this context, the objective of this work is to develop a new composition of friction material for automotive brakes, with tribological and physical properties suitable for the reduction of sparks. For this, the oxidized polyacrylonitrile fiber was added in combination with the materials of the base formulation of the brake system, with equivalent percentage variations of 1:1 (sample S1), 1:2 (sample S2) and 1:4 (sample S3) in volume when compared with aramid fiber originally used. And for zinc borate was added in combination with the base formulation materials with equivalent percentage variations of 5, 10 and 15% (sample S4, S5 and S6) in replacement of the base load. Finally, the combination of fibre and zinc borate was carried out (sample S7) in order to evaluate the combined action. The characterization of the physical properties was carried out through tests of internal shear force, compressibility and thermal transmissibility. Evaluating the material performance, the samples were submitted to the procedure FMVSS 121D. It was possible to verify that sample S7 obtained slightly superior results in relation to the base material in the performance and mechanical tests.

COMMITTEE MEMBERS:
Presidente - 2383615 - DAIANE ROMANZINI
Interno - 1580090 - ANDRE ZIMMER
Interno - 2245376 - PAULO ROBERTO JANISSEK
Externo à Instituição - MATHEUS VINICIUS GREGORY ZIMMERMANN - UNESC