Magneli phase titanium suboxides by Flash Spark Plasma Sintering

SCRIPTA MATERIALIA

卷:146

Article

Yu, Min^1,2  Saunders, Theo^1,2  Grasso, Salvatore^1,2  Mahajan, Amit^1,2  Zhang, Hangfeng¹  Reece, Mike John^1,2 

[1] Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England

[2] Nanoforce Technol Ltd, London E1 4NS, England

关键词: Flash Spark Plasma Sintering;    Magneli phase;    Electrical conductivity;   

DOI  :  10.1016/j.scriptamat.2017.11.044

来源: Elsevier

【 摘 要 】

A Flash Spark Plasma Sintering (FSPS) technique was used to fully densify Magneli phase titanium suboxides (95%TD) in 9 s. A modified FSPS setup contributed to produce homogeneous and dense microstructures, thus avoiding undesired residual porosity at the contact surfaces between samples and electrodes. FSPSed samples retained the original phases (Ti4O7, Ti5O9 and Ti6O11) of the starting powder, whereas Ti4O7 disappeared in those samples densified using Conventional Spark Plasma Sintering (CSPS). Compared to CSPSed samples, FSPSed ones possessed higher room-temperature electrical conductivity (1558 S.cm(-1)). FSPSed sample exhibited good thermoelectric properties with a figure of merit (Zr) of 0.085 at 1073 K. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. This is an open access article under the CC BY license.

【 授权许可】

Free