A study of the mechanically milled h-BN-H system

P. Wang, S. Orimo, H. Fujii

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Defective nanostructured h-BN, with different structural characteristics, can be prepared by mechanical milling under hydrogen and argon atmospheres. When h-BN was mechanically milled under a hydrogen atmosphere, hydrogen could be trapped by the B - and N-dangling bonds formed; the amount of which reached up to 2.6 mass% after 80 h milling. The absorbed hydrogen can be released only as molecular hydrogen starting from about 570 K. As is clarified by a combination of TDS and IR measurements, the hydrogen detrapped from B-H and N-H bonds dominates the desorption at the lower and higher temperature ranges, respectively. After the nanostructured h-BN was heated to 1173 K, some of the hydrogen was still trapped by N-H bonds where, correspondingly, no recrystallization was detected.

Original languageEnglish
Pages (from-to)1235-1239
Number of pages5
JournalApplied Physics A: Materials Science and Processing
Volume78
Issue number8
DOIs
Publication statusPublished - 2004 May
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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