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Showing papers by "Jari Koskinen published in 1987"

Journal Article•DOI•
Comparison of diamondlike coatings deposited with C+ and various hydrocarbon ion beams

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Asko Anttila, Jari Koskinen1, Reijo Lappalainen, J.-P. Hirvonen, D. Stone, C. Paszkiet •
University of Helsinki1
19 Jan 1987-Applied Physics Letters
TL;DR: The mechanical properties of diamond-like coatings deposited with mass-separated C+, CH+3, CH+4, and C2H+2 ion beams have been compared in this article.
Abstract: The mechanical properties of the diamondlike coatings deposited with mass‐separated C+, CH+3, CH+4, and C2H+2 ion beams have been compared. The hardness, abrasive wear resistance, and adhesion of the coatings prepared with the C+ ion beam were superior to those of the coatings prepared with other ions. The most serious drawback of the films prepared with hydrocarbon beams was their brittleness and weak adhesion.

55 citations

Journal Article•DOI•
Characterization of ion-beam-induced carbon deposition on WCCo hard metal by microhardness, scratch and abrasive wear tests

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J.-P. Hirvonen1, Jari Koskinen1, Asko Anttila1, D. Stone2, C. Paszkiet2 •
University of Helsinki1, Cornell University2
01 Jun 1987-Materials Science and Engineering
TL;DR: In this paper, diamond-like ion-beam-deposited carbon (i-C) layers were obtained on WC-Co cemented carbide using a mass-separated 12C beam at an energy of 500 eV and a deposition rate of 3 A s−1.

8 citations