Effect of High‐Energy Ball Milling on Mechanical Properties of the Mg–Nb Composites Fabricated through Powder Metallurgy Process. Issue 3 (6th November 2017)

• Record Type: Journal Article
• Authors: Vahid, Alireza; Hodgson, Peter; Li, Yuncang
• Is Part Of: Advanced engineering materials. Volume 20:Issue 3(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-11-06
• Subjects: Magnesium composite -- Mechanical milling -- Mechanical properties -- Niobium reinforcement -- Powder metallurgy; Materials -- Periodicals; 620.11
• DOI: 10.1002/adem.201700759
• Languages: English
• ISSNs: 1438-1656

Abstract

Abstract : New biocompatible and biodegradable Mg–Nb composites used as bone implant materials are fabricated through powder metallurgy process. Mg–Nb mixture powders are prepared through mechanical milling and manual mixing. Then, the Mg–Nb composites are fabricated through cold press and sintering processes. The effect of mechanical milling and Nb particles as reinforcements on the microstructures and mechanical properties of Mg–Nb composites are investigated. The mechanical milling process is found to be effective in reducing the size of Mg and Nb particles, distributing the Nb particles uniformly in the Mg matrix and obtaining Mg–Nb composite particles. The Mg–Nb composite particles can be bound together firmly during the sintering process, result in Mg–Nb composite structures with no intermetallic formation, lower porosity, and higher mechanical properties compared to composites prepared through manual mixing. Interestingly, the mechanical properties of manually mixed Mg–Nb composites appear to be even lower than that of pure Mg. Abstract : New biodegradable Mg–Nb composites are fabricated through powder metallurgy process. The effect of mechanical milling and Nb particles as reinforcements on the microstructures and mechanical properties of the composites are investigated. The mechanical milling reduces the size of Mg and Nb particles and distributes the Nb particles uniformly in the Mg matrix, produces composites with low porosity and high mechanical properties.