Innovative ultra rapid cooling and atomizing process utilizing vapor explosion and production of new functional powders

Masahiro Furuya, Takahiro Arai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We propose CANOPUS method, which is innovative rapid cooling and liquid atomization process utilizing a sustainable small-scale spontaneous vapor explosion with a vapor explosion promoter as a quenchant. In this manner, one can utilize vapor explosion securely and efficiently to produce the fine amorphous powder. The cooling rate of the CANOPUS method is up to 1.5·108 K/s, which is 280 times higher than that of the conventional water atomizing and is thousands times higher than that of the widely-used gas atomizing. CANOPUS method was successfully applied to a highly viscous (18 Pa s) Mora coal gasification slug, resulting in 30 m powders, which can be used for one of the raw materials of cement. CANOPUS process produces the following highly functional powders: (1) homogeneous materials without segregation, (2) amorphous powders, (3) powders with control grain boundary size, and (4) fine-scale powders. The CANOPUS method allows us to produce new functional materials with excellent tenacious, corrosion resistant, and soft magnetic properties for more practical use, which was difficult to amorphize and control grain boundary size by the other cooling methods so far.

Original languageEnglish
Title of host publicationProceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010
PublisherEuropean Powder Metallurgy Association (EPMA)
ISBN (Print)9781899072194
Publication statusPublished - 2010 Jan 1
Externally publishedYes
EventWorld Powder Metallurgy Congress and Exhibition, World PM 2010 - Florence, Italy
Duration: 2010 Oct 102010 Oct 14

Publication series

NameProceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010
Volume1

Conference

ConferenceWorld Powder Metallurgy Congress and Exhibition, World PM 2010
CountryItaly
CityFlorence
Period10/10/1010/10/14

ASJC Scopus subject areas

  • Mechanics of Materials
  • Ceramics and Composites
  • Materials Chemistry
  • Metals and Alloys
  • Condensed Matter Physics

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