Sliding wear of CaZrO3-MgO composites againt ZrO2 and steel

ABÍLIO SILVA; FERNANDO BOOTH; LILIANA GARRIDO; ESTEBAN AGLIETTI; PILAR PENA; CARMEN BAUDÍN

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY

ELSEVIER SCI LTD

Lugar: Amsterdam; Año: 2016

0955-2219

The wear behaviour of a fine grained and dense CaZrO3-MgO composite is presented. Un-lubricated Pin-on-disc testsat room temperature have been performed using 10 N as normal force and 0.10?0.15 m/s as sliding rate and ZrO2andsteel counterparts. The coefficient of friction versus the sliding distance and the specific wear, together with a completemicrostructural analysis of the worn surfaces by field emission scanning electron microscopy is reported. The compositepresents a wear resistance similar to other ceramics under ceramic/ceramic sliding contact and improved wear resistancein contact with steel.Initial wear is dominated by abrasion independently of the chemical nature of the counterpart. The second stage weardepends on the characteristics of the third body formed. Zirconia leads to a brittle particulate third body with little protectivecapability. Steel forms a strongly bonded and plastic cermet third body that protects the material limiting the levelof further wear.