Effect of Milling on Properties and Consolidation of TiO2 by High-Frequency Induction Heated Sintering

Authors
Shon, In-JinLee, Geon-WooDoh, Jung-MannYoon, Jin-Kook
Issue Date
2013-03
Publisher
KOREAN INST METALS MATERIALS
Citation
ELECTRONIC MATERIALS LETTERS, v.9, no.2, pp.219 - 225
Abstract
Commercial TiO2 powders were high-energy ball milled for various durations and consolidated using high-frequency induction heated sintering (HFIEN). The effect of milling on the sintering behavior, crystallite size and mechanical properties of TiO2 powders were evaluated. A nanostructured dense TiO2 compact with a relative density of up to 98% was readily obtained within 1 min The ball milling effectively refined the crystallite structure of TiO2 powders and facilitated the subsequent densification. The sinter-onset temperature was noticeably reduced by the prior milling for 10 h. Accordingly, the relative density of TiO2 compact increased as the milling time increases. Furthermore, the microhardness and fracture toughness of sintered TiO2 increased as the density increases. It is clearly demonstrated that a quick densification of nano-structured TiO2 bulk materials to near theoretical density could be obtained by the combination of HFIHS and the preparatory high-energy ball milling processes.
Keywords
LOW-TEMPERATURE; THIN-FILMS; NANOCRYSTALLINE; DENSIFICATION; FABRICATION; ELECTRODES; COMPOSITE; CERAMICS; GROWTH; CELLS; LOW-TEMPERATURE; THIN-FILMS; NANOCRYSTALLINE; DENSIFICATION; FABRICATION; ELECTRODES; COMPOSITE; CERAMICS; GROWTH; CELLS; nanomaterials; sintering; hardness; fracture toughness; TiO2
ISSN
1738-8090
URI
https://pubs.kist.re.kr/handle/201004/128294
DOI
10.1007/s13391-012-2142-7
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KIST Article > 2013
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