Sliding Properties of Composite Sprayed Coating between Bronze Powder and Solid Lubricant

• Published in: MATERIALS TRANSACTIONS Vol. 44; no. 5; pp. 1024 - 1028
• Main Authors: Kobayashi, Takeshi, Maruyama, Toru, Yasuda, Tsutomu
• Format: Journal Article
• Language: English
• Published: Sendai The Japan Institute of Metals and Materials 2003; Japan Science and Technology Agency
• Subjects: calcium fluoride; composite coating; composite spraying; copper base alloy; lead free material; powder flame spraying; sliding property; solid lubricant; wear test
• ISSN: 1345-9678; 1347-5320
• DOI: 10.2320/matertrans.44.1024

Intake of lead is harmful to the human body. Therefore, it is necessary to substitute other alloying elements for lead in Cu alloys. Using a Cu–9.5 mass%Sn alloy powder and CaF2, which has sliding properties equal to lead, a composite sprayed coating (by flame spraying) was developed. The results were as follows. A composite sprayed coating with the desired characteristics was successfully produced. The area fraction of the CaF2 layer in the composite coating increased with the increase in the blend ratio of CaF2 in the blended powder. The wear resistance of the composite coating containing CaF2 was excellent. As a result it was determined that CaF2 in the composite coating was effective as a sliding material substitute for lead.