Title: Preparation, characterisation and machining of LaPO4-Y2O3 composite by abrasive water jet machine

Authors: K. Balamurugan; M. Uthayakumar; S. Sankar; U.S. Hareesh; K.G.K. Warrier

Addresses: Faculty of Mechanical Engineering, Kalasalingam University, Krishnankoil 626-126, India ' Faculty of Mechanical Engineering, Kalasalingam University, Krishnankoil 626-126, India ' Material Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Thiruvananthapuram 695019, India ' Material Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Thiruvananthapuram 695019, India ' Material Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Thiruvananthapuram 695019, India

Abstract: This article illustrates the work done on preparing a new ceramic matrix composite with the proportional concentration of Lanthanum phosphate (LaPO4) (80 wt.%) and Yttria (Y2O3) (20 wt.%) by aqueous sol-gel process. The prepared nano powder is compacted to 480 MPa at 28°C (room temperature) followed by sintering at 1,400°C for two hours to get the required disc shape geometry. The prepared ceramic matrix composite was machined using abrasive water jet machining (AWJM). Grey relational analysis (GRA) is performed with various input parameters like jet pressure (JP), stand-off distance (SOD) and traverse speed (TS) to measure the deviations in performance characteristics such as material removal rate (MRR), kerf angle (KA) and surface roughness (Ra). The significant correlations of these parameters were analysed by using analysis of variance (ANOVA). From the experimental work it is evident that SOD has significant contribution of about 60.89% and it affects the output performance characteristics to a great extent. Confirmation experiment is also carried out to validate the results.

Keywords: lanthanum phosphate-yttria composite; abrasive water jet machine; kerf angle; material removal rate; MRR; surface roughness.

DOI: 10.1504/IJCAET.2018.095203

International Journal of Computer Aided Engineering and Technology, 2018 Vol.10 No.6, pp.684 - 697

Received: 20 Jul 2016
Accepted: 23 Aug 2016

Published online: 02 Oct 2018 *

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