Microstructure and Scratch Resistance of Ceramic Surfaces

Authors : A TUCCİ, Jb GUİON, L ESPOSİTO

Pages : 229-237

View : 30 | Download : 15

Publication Date : 2009-12-01

Article Type : Research Paper

Abstract :In order to gain a fundamental understanding of material removal mechanisms and damage morphology in brittle materials, such as ceramics, several studies using both static indentation and scratch test have been conducted. Since the 1980’s, it is known as the results of a scratch test provides information concerning the cracking of brittle materials, close to those induced by the indentation test, [1]. As regards, while hardness determination represents the result of a static indentation test, involving only a normal load applied to an indenter having different tip geometry (spherical, conical or pyramidal) and coming into contact with the surface of the material to be analysed, in the scratch test the normal load, LN, is applied to an indenter with the same geometry, but into contact with the surface of a moving sample. The effects induced on the surface of the sample by the combination of the normal and tangential loads, (LN and LT) overcoming, under definite conditions, the strength of the material, lead to an elastic-plastic deformation the effect of which is the formation of a scar. 
Keywords : Microstructure, Scratch, Resistance