# Tribology performance, airborne particle emissions and brake squeal noise of copper-free friction materials

> Research article (Wear, 2020) · cited 45× · AI/ML

**Wikidata**: [openalex:W3005204614](https://www.wikidata.org/wiki/openalex:W3005204614)  
**Source**: https://4ort.xyz/entity/tribology-performance-airborne-particle-emissions-and-brake-squeal-noise-of-copper-free-friction-materials