Recatest-A Technique for Qualitative and Quantitative Assessment of Deferment and Degraded PVD Coatings and CVD Layers in the Deformed Area in the Scratch Test.

Piotr Domanowski,Marek Betiuk

doi:10.3390/ma14102625

Abstract

The purpose of the paper is to present a new Recatest testing technique which uses a series of abrasions within a scratch and its innovative application to describe selected quantitative parameters of locally, plastically deformed substrate and coating materials detected on the spherical microsection in the scratch test. The exposed material structures are subject to a metallographic analysis which allows for the determination of the quantitative parameters, which in turn allow for a description of the change in dynamics of the coating structure within the scratch area as a function of load. These parameters include scratch depth (hs), coating thickness (h1), flash height (hoc, hos), depth of intended material (hd), material depth under scratch (hcp), and material depth under coating (hdb). The paper also includes a description of the Recalo test device designed by the authors, which is used to make a series of spherical abrasion traces on the scratch surface. Recalo is dedicated to the Recatest technique. The analysed material was the CrN/CrCN/HS6-5-2, AlCrN -Alcrona-Balinit/D2 coatings deposited on tool steels.

Highlights

Modern diffusion layers and coatings are multifunctional materials
With the quantitative data obtained from the analysis of spherical microsections in a few scratch areas it is possible to determine microstructure change dynamics for a coating areological system as a function of a normal penetrator loading force function: hs (Fn) (Figure 26b)
The analysis of the AlCrN-Alcrona Balinit coating in the scratch test using the Recat

Summary

Introduction

Modern diffusion layers and coatings are multifunctional materials. They have a complex phase structure and are multilayered. The coatings and layers with the substrate form an aerological system. The system will be formed as a result of a complex material structure being formed on the substrate surface, including a layered composition of materials of varying physical, chemical and mechanical parameters. The CVD (chemical vapor deposition), PVD (physical vapor deposition) coatings form an aerological system adapted to the operational conditions of use. The improvement of such system based on the market requirements is a stimulus of progress in the field of material technology and complex structure materials

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