Selective Laser Melting of Ti/cBN Composite

• Published in: Key engineering materials Vol. 799; pp. 257 - 262
• Main Authors: Antonov, Maksim, Minasyan, Tatevik, Hussainova, Irina, Aydinyan, Sofiya, Liu, Le
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 26.04.2019
• Subjects: Biocompatibility; Biomedical materials; Boron; Cellular manufacture; Cellular structure; Cubic boron nitride; Densification; Laser beam melting; Laser sintering; Lasers; Machinability; Mechanical properties; Organic chemistry; Rapid prototyping; Sinterability; Sporting goods; Surgical implants; Titanium; Titanium base alloys; Wear resistance; Weight reduction; Titanium Implant; Selective Laser Melting; Cubic Boron Nitride
• ISSN: 1013-9826; 1662-9795; 1662-9795
• DOI: 10.4028/www.scientific.net/KEM.799.257

Titanium has been evaluated in a broad range of aerospace, biomedical and sports equipment applications due to its unique combination of high mechanical strength, light weight and good biocompatibility. However, Ti implants are often subject to wear in specific areas. Therefore, the improvement of mechanical properties, such as hardness, wear resistance, bearing capability of implants is a key point to broaden the application fields of titanium. Cubic boron nitride (cBN) is a well-known superhard material possessing high chemical stability and biocompatibility. However, cBN suffers from poor machinability and sinterability. Attempts to process boron nitride by laser treatment into intricate shapes are extremely difficult, expensive and time-consuming tasks squeezing its applicability. In this work, manufacturing of Ti/cBN cellular structures and solid parts of high strength and good wear resistance by selective laser melting was performed. In Ti/cBN composite powder, the boron nitride provides the excellent mechanical properties, and titanium promotes the laser absorption improving the process of densification. The parametric study of consolidation process has been performed and the microstructural features along with mechanical properties are examined.