Nanofragmentation controlled by a shock-induced phase transition in mullite related ceramics and its application

T. Atou, N. Kawai, K. Yubuta, S. Ito, M. Kikuchi

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

1 被引用数 (Scopus)

抄録

Mullite (3Al2O3•2SiO2) undergoes a phase transition at 30 GPa with forming aligned nanocrystalline fragments in an amorphous phase. The direction of the crystal axes of mullite nano-crystals with the grain sizes less than 10 nm is that preserved from the starting specimen. To clarify the mechanism of the nanofragmentation in mullite, compositional and structural effects are investigated by comparative studies using several mullite-related aluminosilicates. Consequently, we proposed that the oxygen vacancies in the crystal structure in mullite play an important role to formation of the nanofragmentation textures. Also, we performed impact experiments using mullite as a bumper material, simulating a Whipple bumper shield for spacecrafts. Damage of impact could be considerably less with mullite bumper shield than with aluminum alloy bumper shield, suggesting that mullite could be an candidate for a Whipple bumper materials in the next generation.

本文言語英語
ホスト出版物のタイトルTHERMEC 2011
出版社Trans Tech Publications Ltd
ページ717-722
ページ数6
ISBN(印刷版)9783037853030
DOI
出版ステータス出版済み - 2012
外部発表はい
イベント7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011 - Quebec City, QC, カナダ
継続期間: 8 1 20118 5 2011

出版物シリーズ

名前Materials Science Forum
706-709
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

その他

その他7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011
国/地域カナダ
CityQuebec City, QC
Period8/1/118/5/11

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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