Novel ZA27/B4C/Graphite Hybrid Nanocomposite-Bearing Materials with Enhanced Wear and Corrosion Resistance

• Published in: Metallurgical and materials transactions. A, Physical metallurgy and materials science Vol. 51; no. 9; pp. 4632 - 4646
• Main Authors: Güler, Onur, Çelebı, Müslım, Dalmış, Ramazan, Çanakçi, Aykut, Çuvalci, Hamdullah
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.09.2020; Springer Nature B.V
• Subjects: Bearing materials; Boron carbide; Characterization and Evaluation of Materials; Chemistry and Materials Science; Coefficient of friction; Corrosion rate; Corrosion resistance; Corrosion tests; Corrosive wear; Grain size distribution; Graphite; Hot pressing; Materials Science; Mechanical milling; Metallic Materials; Nanocomposites; Nanotechnology; Structural Materials; Surfaces and Interfaces; Thin Films; Wear resistance; Zinc base alloys
• ISSN: 1073-5623; 1543-1940
• DOI: 10.1007/s11661-020-05863-5

In this study, nanosized B 4 C and graphite-reinforced ZA27 matrix hybrid nanocomposites were produced with mechanical milling followed by hot pressing. The friction coefficient values of nanocomposite samples remarkably decreased from 0.5036 (± 0.085) to 0.2575 (± 0.021) with the increase of milling time to 24 hours for nanocomposite powders. That was almost two times lower than those of unmilled nanocomposites. It was determined that the good distribution of reinforcement particles in the microstructure and low grain size allowed the formation of a protective oxide layer against corrosion. The corrosion resistance of the nanocomposite materials obtained from nanocomposite powders milled for 24 hours was quite superior to the others. The results revealed that the corrosion rate values were 29.068 and 4.033 mpy for hybrid nanocomposite samples produced from unmilled and milled powders for 24 hours, respectively.