Effect Of Sintering Temperature On Density, Hardness And Tool Wear For Alumina-Zirconia Cutting Tool

Abu Bakar, Mohd Hadzley and Tamin, Nor Fauzi and Al-Amani, Umar and Azhar, Anis Afuza and Mokhtar, Muhammad Faiz and Hamed, Muhammad Fitri Naim (2019) Effect Of Sintering Temperature On Density, Hardness And Tool Wear For Alumina-Zirconia Cutting Tool. Journal of Mechanical Engineering and Sciences, 13 (1). pp. 4648-4660. ISSN 2289-4659

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Abstract

Combination of alumina (Al 2 O 3 ) and zirconia (ZrO 2 ) as cutting tool have been established themselves as a dominant in ceramic category for dry machining. The mechanical properties of Al 2 O 3 -ZrO 2 cutting tool were critically dependent on its density and hardness, which affected by the powder preparation and sintering processes. This paper present the effect of sintering temperature on density, hardness and tool wear of Al 2 O 3 -ZrO 2 cutting tool. Specific composition of 80-90 wt% Al 2 O 3 and 10-20 wt% ZrO 2 powders were mixed and ball milled for 12 hours. These powders then were compacted in the form of RNGN120600 designated cutting tool by using manual hydraulic press before undergone secondary compaction by Cold Isostatic Press. The compacted powders then were sintered from 1200°C to 1400°C at constant 9 hours soaking time. For each sintered cutting tool, evaluation has been made based on the density and hardness. By using AISI 1045 as a workpiece material, the wear performance of the selected cutting tools were evaluated within 200-350 m/min cutting speeds, 0.1 mm/rev feed rate and 0.5 mm depth of cut. The results shows that the sintering temperature at 1400°C and 9 hours soaking time produced maximum relative density and hardness for 90 wt% Al 2 O 3 and 10 wt% ZrO 2 at 94.17% and 63.4 HRC respectively. Cutting tool contained with 80 wt% Al 2 O 3 and 20 wt% ZrO 2 contributed maximum relative density of 97% and hardness of 70.07 HRC. Maximum tool life recorded was 156s at 200 m/min cutting speed. Wear mechanisms of fabricated cutting tool dominated by the notch and flank wear at the early stage of machining and formation built up edge at the end of machining process.

Item Type:	Article
Uncontrolled Keywords:	Alumina, Cutting tool, Density, Hardness, Machining, Sintering, Tool wear, Zirconia
Divisions:	Faculty of Manufacturing Engineering
Depositing User:	Sabariah Ismail
Date Deposited:	03 Dec 2020 12:48
Last Modified:	03 Dec 2020 12:48
URI:	http://eprints.utem.edu.my/id/eprint/24431
Statistic Details:	View Download Statistic

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