Effects of different carbon sources on the compressive properties of in situ high-volume-fraction TiCx/2009Al composites. (19th October 2016)

• Record Type: Journal Article
• Authors: Wang, L.; Qiu, F.; Shu, S.-L.; Zhao, Q.-L.; Jiang, Q.-C.
• Is Part Of: Powder metallurgy. Volume 59:Number 5(2016)
• Page Start: 370
• Page End: 375
• Publication Date: 2016-10-19
• Subjects: Different carbon sources -- TiCx particles -- Morphology -- Composites -- Compressive properties; Powder metallurgy -- Periodicals; 671.3705
• DOI: 10.1080/00325899.2016.1251061
• Languages: English
• ISSNs: 0032-5899

Abstract

Abstract : Effects of carbon sources, i.e. carbon nanotubes (CNTs), graphite, carbon black (C-black), on synthesised TiC x size, shape and compressive properties of in situ 40–60 vol.-% TiC x /2009Al composites were investigated. When CNTs and C-black were used, the synthesised TiC x with particle sizes of 0.08–1 and 0.9–5 µm, respectively, was spherical or nearly spherical in shape, while graphite was used, the synthesised TiC x with particles sizes of 0.2–2 µm was octahedral or spherical in shape. The yield strength ( σ 0.2 ), ultimate compression strength ( σ UCS ) and hardness of TiC x /2009Al composites all increased with increasing TiC x content, while the plastic strain ( ε ) decreased. The σ 0.2, σ UCS, ε and hardness of 60 vol.-% TiC x /2009Al composites fabricated by using CNTs were 722 MPa, 946 MPa, 3.2% and 260 ± 10 Hv, respectively. The strength increase of the composites resulted from finer-sized TiC x particles with spherical shape.