TY - JOUR
T1 - Taguchi analysis on the effect of hot pressing parameters on density and hardness of zirconium diboride
AU - Shahedi Asl, Mehdi
AU - Ghassemi Kakroudi, Mahdi
AU - Nayebi, Behzad
AU - Nasiri, Hadi
N1 - Publisher Copyright:
© 2014 Elsevier Ltd. All rights reserved.
PY - 2015/5
Y1 - 2015/5
N2 - The influence of process parameters on density and hardness of monolithic zirconium diboride ceramic, during hot pressing, has been investigated. This paper publicizes a design of experiment approach, Taguchi methodology, used to improve the processing of ZrB2 concentrated upon three sintering parameters: temperature, dwell time and pressure. An L9 orthogonal array procedure, involves nine experiments for three factors with three levels, which comprises the signal to noise ratio and analysis of variance was employed to optimize the hot pressing parameters. The "higher is better" condition was selected as the quality characteristic. The statistical analysis recognized consolidating temperature as the most consequential factor affecting the relative density and hardness of ZrB2. A relative density of ~ 93% was obtained with a temperature of 1850 °C, dwell time of 90 min and pressure of 16 MPa. The Vickers hardness of ZrB2 reached ~ 13.5 GPa at optimal hot pressing conditions. The confirmation tests, carried out under optimum conditions, revealed that the experimental results were in harmony with the expected values from the Taguchi model.
AB - The influence of process parameters on density and hardness of monolithic zirconium diboride ceramic, during hot pressing, has been investigated. This paper publicizes a design of experiment approach, Taguchi methodology, used to improve the processing of ZrB2 concentrated upon three sintering parameters: temperature, dwell time and pressure. An L9 orthogonal array procedure, involves nine experiments for three factors with three levels, which comprises the signal to noise ratio and analysis of variance was employed to optimize the hot pressing parameters. The "higher is better" condition was selected as the quality characteristic. The statistical analysis recognized consolidating temperature as the most consequential factor affecting the relative density and hardness of ZrB2. A relative density of ~ 93% was obtained with a temperature of 1850 °C, dwell time of 90 min and pressure of 16 MPa. The Vickers hardness of ZrB2 reached ~ 13.5 GPa at optimal hot pressing conditions. The confirmation tests, carried out under optimum conditions, revealed that the experimental results were in harmony with the expected values from the Taguchi model.
KW - Density
KW - Hardness
KW - Hot pressing
KW - Taguchi method
KW - Zirconium diboride
UR - http://www.scopus.com/inward/record.url?scp=84925491888&partnerID=8YFLogxK
U2 - 10.1016/j.ijrmhm.2014.09.006
DO - 10.1016/j.ijrmhm.2014.09.006
M3 - Article
AN - SCOPUS:84925491888
SN - 0263-4368
VL - 50
SP - 313
EP - 320
JO - International Journal of Refractory Metals and Hard Materials
JF - International Journal of Refractory Metals and Hard Materials
ER -