Journal Published Online: 11 July 2011
Volume 8, Issue 7

Influence of Structure on Brittleness of Boron Nitride Coatings Deposited on Cemented Fine-Grained Carbides

CODEN: JAIOAD

Abstract

The article presents the brittleness study of boron nitride coatings deposited on cutting edges made of fine-grained cemented carbides by the pulse-plasma method (PPD). Influences of the structure (density, pores, microcracks) of coating material on the brittleness and on selected technological parameters of boron nitride formation by PPD method particularly taking into account discharge voltage on brittleness are shown. Differences between values of total average crack length ΣL, critical loads (Pk300, Pk500), and coefficients (a1(300) and a1(500)) characterized susceptibility to cracking of investigated coatings manufactured using different values of production process were defined. Results of investigations have confirmed the usefulness of Palmqvist’s method for measurement of coating susceptibility to brittle cracking.

Author Information

Kupczyk, Maciej
Poznan Univ. of Technology, Institute of Mechanical Technology, Poland
Siwak, Piotr
Poznan Univ. of Technology, Institute of Mechanical Technology, Poland
Pages: 7
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Details
Stock #: JAI103266
ISSN: 1546-962X
DOI: 10.1520/JAI103266