Two-phase single layer Al-O-N nanocomposite films with enhanced resistance to cracking

J. Musil, R. Jílek, M. Meissner, T. Tölg, R. Čerstvý

Результат исследований: Материалы для журналаСтатья

38 Цитирования (Scopus)

Аннотация

The article reports on dc pulsed reactive sputtering of two-phase single layer Al-O-N nanocomposite films using dual magnetron in a mixture of N 2+O 2 with pulsed inlet of oxygen. Two kinds of nanocomposite films were sputtered: (1) nc-AlN/a-(Al-O-N) film and (2) nc-(γ-Al 2O 3)/a-(Al-O-N) nanocomposite film; here nc- and a- denotes the nanocrystalline and amorphous phase, respectively. The transition from the nc-AlN/a-(Al-O-N) nanocomposite to the nc-(γ-Al 2O 3)/a-(Al-O-N) nanocomposite was controlled by the length of the period of oxygen pulses T O2. It was found that both nanocomposites are highly elastic films with relatively high hardness H=15 to 20GPa, low effective Young's modulus E * satisfying the condition that the ratio H/E *>0.1, high elastic recovery W e>60% and high resistance to cracking in bending. Correlations between the film structure and its mechanical properties are discussed in detail.

Язык оригиналаАнглийский
Страницы (с-по)4230-4234
Число страниц5
ЖурналSurface and Coatings Technology
Том206
Номер выпуска19-20
DOI
СостояниеОпубликовано - 25 мая 2012

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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