Hot wear properties of ceramic and basalt fiber reinforced hybrid friction materials

• Published in: Tribology international Vol. 40; no. 1; pp. 37 - 48
• Main Authors: Öztürk, Bülent, Arslan, Fazlı, Öztürk, Sultan
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 2007; Elsevier
• Subjects: Applied sciences; Basalt; Ceramic; Exact sciences and technology; Friction, wear, lubrication; Hybrid friction material; Machine components; Mechanical engineering. Machine design; Basalt; Ceramic; Hybrid friction material; Scanning electron microscopy; Wear particle; Wear test; Cast iron; Fiber reinforced material; Mechanical properties; Experimental study; X ray diffraction; Friction material; Cast metal; Composite material; Friction; Wear rate; Wear; Friction coefficient; Ceramic materials; Pin disk test; Ceramic fiber; Tribology
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2006.01.027

In the present study, hybrid friction materials were manufactured using ceramic and basalt fibers. Ceramic fiber content was kept constant at 10 vol% and basalt fiber content was changed between 0 to 40 vol%. Mechanical properties and friction and wear characteristics of friction materials were determined using a pin-on-disc type apparatus against a cast iron counterface in the sliding speeds of 3.2–12.8 m/s, disc temperature of 100–350 °C and applied loads of 312.5–625 N. The worn surfaces of the specimens were examined by SEM. Experiments show that fiber content has a significant influence on the mechanical and tribological properties of the composites. The friction coefficient of the hybrid friction materials was increased with increasing additional basalt fiber content. But the specific wear rates of the composites decreased up to 30 vol% fiber content and then increased again above this value. The wear tests showed that the coefficient of friction decreases with increasing load and speed but increases with increasing disc temperature up to 300 °C. The most important factor effecting wear rate was the disc temperature followed by sliding speed. The materials showing higher specific wear rates gave relatively coarser wear particles. XRD studies showed that Fe and Fe 2O 3 were present in wear debris at severe wear conditions which is indicating the disc wear.