Mechanical synthesis and rapid consolidation of nanocrystalline TiCo-Al2O3 composites by high frequency induction heated sintering

Title
Mechanical synthesis and rapid consolidation of nanocrystalline TiCo-Al2O3 composites by high frequency induction heated sintering
Authors
윤진국손인진
Keywords
Sintering; Composite; Nanomaterial; Mechanical properties; Synthesis
Issue Date
2016-07
Publisher
Journal of ceramic processing research
Citation
VOL 17, NO 7-726
Abstract
Despite of many attractive properties of TiCo, TiCo in industry has been limited due to low fracture toughness and a low hardness. The mechanical properties can be improved significantly by reinforcing TiCo with hard ceramic particles such as Al2O3 and by fabrication of nanostructured composite. Nanomaterials have received a good deal of attention recently as they possess high strength, high hardness, excellent ductility and toughness. In recent days, nanocrystalline powders have been developed by the thermochemical and thermomechanical process named as the spray conversion process (SCP), co-precipitation and high energy milling. Nano-powders of TiCo and Al2O3 were synthesized from CoTiO3 and 2Al powders by high energy ball milling. Nanocrystalline Al2O3 reinforced composite was consolidated by high frequency induction heated sintering within one minute from mechanochemically synthesized powders of Al2O3 and TiCo. The relative density of the composite was 98%. The average hardness and fracture toughness values obtained were 1180 kg/mm(2) and 8.5MPa.m(1/2), respectively.
URI
http://pubs.kist.re.kr/handle/123456789/64721
ISSN
1229-9162
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KIST Publication > Article
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