Effects of Cr sub(2)O sub(3) addition on the mechanical properties, microstructure and wear performance of zirconia-toughened-alumina (ZTA) cutting inserts

The effects of Cr sub(2)O sub(3) addition on microstructure, the mechanical properties and wear performance of ZTA were investigated. The powders of alumina, yttria partially stabilized zirconia and chromia were mixed and uniaxially pressed into rhombic cutting tool inserts and subsequently sintered...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2012-02, Vol.513, p.91-96
Main Authors: Azhar, Ahmad Zahirani Ahmad, Choong, Lee Chun, Mohamed, Hasmaliza, Ratnam, Mani Maran, Ahmad, Zainal Arifin
Format: Article
Language:English
Subjects:
Chromium oxides
Cutting
Cutting tools
Cutting wear
Inserts
Mechanical properties
Microstructure
Wear
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effects of Cr sub(2)O sub(3) addition on microstructure, the mechanical properties and wear performance of ZTA were investigated. The powders of alumina, yttria partially stabilized zirconia and chromia were mixed and uniaxially pressed into rhombic cutting tool inserts and subsequently sintered at 1600 degree C for 4 h in air. The effects of the cutting tool inserts' microstructures on their mechanical properties and wear performance were carried out. The microstructural observations show that the Al sub(2)O sub(3) grain size is significantly dependent on the amount of Cr sub(2)O sub(3) additives used. The Vickers hardness and fracture toughness tests are directly related to the results of wear area, where the cutting insert with the minimum wear area also showed the highest hardness and fracture toughness. The results show that an addition of 0.6 wt% of Cr sub(2)O sub(3) produces the minimum wear area. ZTA cutting inserts fabricated with Cr sub(2)O sub(3) additives show an increase of 26% in wear resistant capability.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2011.09.092