Formation mechanism of suicide nanoparticles by induction thermal plasmas

Takayuki Watanabe, Hideaki Okumiya

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

The condensation mechanism of metal mixture in thermal plasmas was investigated experimentally and numerically to prepare nanoparticles of silicon base intermetallic compounds. Silicon powder premixed with metal powder (Mo, Ti, Co, Fe, Cr, or Mn) was introduced into the plasma. The nanoparticles were prepared on condition that metal vapor was quickly quenched by the water-cooled copper coil. The nucleation rate expression was used for the estimation of critical saturation ratio. The nucleation temperature of the metal almost corresponds to the melting temperature, while silicon has wide liquid range between the nucleation and melting temperature, resulting in better preparation of silicide. For Mo-Si system, nucleation position of Mo is different from that of Si. Therefore, quenching position has strong effect on the particle composition of molybdenum silicide nanoparticles.

Original languageEnglish
Pages (from-to)639-646
Number of pages8
JournalScience and Technology of Advanced Materials
Volume5
Issue number5-6
DOIs
Publication statusPublished - Sep 1 2004
Externally publishedYes

Fingerprint

Plasma Gases
Silicon
Nucleation
Nanoparticles
Plasmas
Metals
Melting point
Molybdenum
Powder metals
Powders
Intermetallics
Copper
Condensation
Quenching
Vapors
Hot Temperature
Water
Liquids
Chemical analysis
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Formation mechanism of suicide nanoparticles by induction thermal plasmas. / Watanabe, Takayuki; Okumiya, Hideaki.

In: Science and Technology of Advanced Materials, Vol. 5, No. 5-6, 01.09.2004, p. 639-646.

Research output: Contribution to journalArticle

@article{cec40b6c062c476bb613a867573fe02e,
title = "Formation mechanism of suicide nanoparticles by induction thermal plasmas",
abstract = "The condensation mechanism of metal mixture in thermal plasmas was investigated experimentally and numerically to prepare nanoparticles of silicon base intermetallic compounds. Silicon powder premixed with metal powder (Mo, Ti, Co, Fe, Cr, or Mn) was introduced into the plasma. The nanoparticles were prepared on condition that metal vapor was quickly quenched by the water-cooled copper coil. The nucleation rate expression was used for the estimation of critical saturation ratio. The nucleation temperature of the metal almost corresponds to the melting temperature, while silicon has wide liquid range between the nucleation and melting temperature, resulting in better preparation of silicide. For Mo-Si system, nucleation position of Mo is different from that of Si. Therefore, quenching position has strong effect on the particle composition of molybdenum silicide nanoparticles.",
author = "Takayuki Watanabe and Hideaki Okumiya",
year = "2004",
month = "9",
day = "1",
doi = "10.1016/j.stam.2004.03.015",
language = "English",
volume = "5",
pages = "639--646",
journal = "Science and Technology of Advanced Materials",
issn = "1468-6996",
publisher = "IOP Publishing Ltd.",
number = "5-6",

}

TY - JOUR

T1 - Formation mechanism of suicide nanoparticles by induction thermal plasmas

AU - Watanabe, Takayuki

AU - Okumiya, Hideaki

PY - 2004/9/1

Y1 - 2004/9/1

N2 - The condensation mechanism of metal mixture in thermal plasmas was investigated experimentally and numerically to prepare nanoparticles of silicon base intermetallic compounds. Silicon powder premixed with metal powder (Mo, Ti, Co, Fe, Cr, or Mn) was introduced into the plasma. The nanoparticles were prepared on condition that metal vapor was quickly quenched by the water-cooled copper coil. The nucleation rate expression was used for the estimation of critical saturation ratio. The nucleation temperature of the metal almost corresponds to the melting temperature, while silicon has wide liquid range between the nucleation and melting temperature, resulting in better preparation of silicide. For Mo-Si system, nucleation position of Mo is different from that of Si. Therefore, quenching position has strong effect on the particle composition of molybdenum silicide nanoparticles.

AB - The condensation mechanism of metal mixture in thermal plasmas was investigated experimentally and numerically to prepare nanoparticles of silicon base intermetallic compounds. Silicon powder premixed with metal powder (Mo, Ti, Co, Fe, Cr, or Mn) was introduced into the plasma. The nanoparticles were prepared on condition that metal vapor was quickly quenched by the water-cooled copper coil. The nucleation rate expression was used for the estimation of critical saturation ratio. The nucleation temperature of the metal almost corresponds to the melting temperature, while silicon has wide liquid range between the nucleation and melting temperature, resulting in better preparation of silicide. For Mo-Si system, nucleation position of Mo is different from that of Si. Therefore, quenching position has strong effect on the particle composition of molybdenum silicide nanoparticles.

UR - http://www.scopus.com/inward/record.url?scp=9444259235&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=9444259235&partnerID=8YFLogxK

U2 - 10.1016/j.stam.2004.03.015

DO - 10.1016/j.stam.2004.03.015

M3 - Article

VL - 5

SP - 639

EP - 646

JO - Science and Technology of Advanced Materials

JF - Science and Technology of Advanced Materials

SN - 1468-6996

IS - 5-6

ER -