Detail publikace

Oxygen Impurities in Ti-Si-N and Related Systems are Hindering the Phase Segregation, Formation of Stable Nanostructure and Degrading the Cutting Performance of Tools Coated with the Nanocomposites

VEPREK, S. PÍŠKA, M.

Originální název

Oxygen Impurities in Ti-Si-N and Related Systems are Hindering the Phase Segregation, Formation of Stable Nanostructure and Degrading the Cutting Performance of Tools Coated with the Nanocomposites

Typ

audiovizuální tvorba

Jazyk

angličtina

Originální abstrakt

We have shown earlier, that an oxygen impurity content of more than0.4 at.p. (4000 ppm) strongly degrades the hardness of the nc-TiN/a-Si3N4 nanocomposites. Here we show that such impurities also hinder the phase segregation and formation of stable and strong nanostructure consisting of 3-4 nm size TiN nanocrystals "glued" together by about 1 monolayer thick interfacial Si3N4-like layer, thus apparently stabilizing the solid solution at high temperature of more 900C, as reported by other researchers. At the impurity content of only few hundred ppm, the segregation is completed, and a stable nanostructure formed at temperature less 550C. By decreasing the impurity content from 2000-3000 ppm down to about 1000 ppm in an industrial PVD coating equipment, the life time of cutting tools has been increased by a factor of 2.

Klíčová slova

Superhard Nanocomposites; Impurities; Oxygen; Thermal Stability; TiSiN

Autoři

VEPREK, S.; PÍŠKA, M.

Vydáno

24. 7. 2011

Nakladatel

A.J. Drexel Plasma Institute

Místo

Philadelphia USA

ISBN

9241562676

Kniha

20th International Symposium on Plasma Chemistry http://ispc20.plasmainstitute.org/

Edice

první

Číslo edice

1

Strany od

54

Strany do

57

Strany počet

4

URL

http://ispc20.plasmainstitute.org/

BibTex

@misc{BUT73916,
  author="Stan {Veprek} and Miroslav {Píška}",
  title="Oxygen Impurities in Ti-Si-N and Related Systems are Hindering the Phase Segregation, Formation of Stable Nanostructure and Degrading the Cutting Performance of Tools Coated with the Nanocomposites",
  booktitle="20th International Symposium on Plasma Chemistry http://ispc20.plasmainstitute.org/",
  year="2011",
  series="první",
  edition="1",
  pages="54--57",
  publisher="A.J. Drexel Plasma Institute",
  address="Philadelphia USA",
  isbn="9241562676",
  url="http://ispc20.plasmainstitute.org/",
  note="presentation"
}