TY  - JOUR
TT  - A SYSTEMATIC PROCEDURE TO STUDY HOT PRESSING AND SPARK PLASMA SINTERING KINETICS
AU  - Özer, İsmail Özgür
AU  - Güvenç, Çetin Meriç
PY  - 2017
DA  - June
DO  - 10.18038/aubtda.305182
JF  - Anadolu University Journal of Science and Technology A - Applied Sciences and Engineering
JO  - AUJST-A
PB  - Eskisehir Technical University
WT  - DergiPark
SN  - 1302-3160
SP  - 419
EP  - 428
VL  - 18
IS  - 2
KW  - Formal sintering analysis
KW  - Modified creep equation
N2  - A procedure for data collection andprocessing was developed to conduct accurate kinetic analysis in pressureassisted sintering techniques, such as hot pressing (HP) and spark plasma sintering(SPS). Densification of MgAl2O4 by SPS was chosen as amodel system, where the kinetics were analyzed by utilizing the modified creepequation. Displacement data used in the equation was gathered by pathmeasurement system (PMS) of the SPS equipment. Effects of temperature controlaccuracy, load cell accuracy and resolution of the PMS on the reliability ofcollected displacement data were evaluated. Dilution of the data in order to reducethe noise in strain rate values caused by the low resolution of the PMS system,which is only 10 μm, was observed to affect calculated stress exponents (n),significantly. Different n values in the range of 1.7-2.8 in a narrow intervalof 83-86 % relative densities were found as a function of dilution degree. Onthe other hand, differentiating the strain with respect to the time interval ofevery single 10 μm displacement was shown to provide more consistent results. nvalues of ≈2.2 with a standard deviation of 0.15 were calculated for the samedensity intervals.
CR  - [1] Rahaman MN. Ceramic Processing and Sintering. 2nd ed. New York, NY, USA: Marcel Dekker Inc., 2004.
CR  - [2] Ting C-J, Lu, H-Y. Hot pressing of magnesium aluminate spinel – I.kinetics and densification mechanism. Acta Mater 1999; 3: 817-830.
CR  - [3] Bernard-Grange G, Benameur N, Addad A, Nygren M, Guizard C, Deville S. Phenomenological analysis of densification mechanism during spark plasma sintering of MgAl2O4. J Mater Res 2009; 6: 2011-2020.
CR  - [4] Morita K, Kim B-N, Yoshida H, Hiraga K. Densification behavior of a fine-grained MgAl2O4 spinel during spark plasma sintering (SPS). Scripta Materialia 2010; 63: 565-568.
CR  - [5] Bratton RJ, Terwilliger GR, Ho SM. Densification phenomena in the hot-pressing of spinel. J Mater Sci 1972; 1363-1368.
CR  - [6] Du X, Zhang Z, Wang Y, Wang J, Wang W, Wang H. Hot-pressing kinetics and densification mechanisms of boron carbide. J Am Ceram Soc 2015; 98: 1400-1406.
CR  - [7] Ting C-J, Lu H-Y. Hot pressing of magnesium aluminate spinel – II. microstructure development. Acta Mater 1999; 3: 831-840.
CR  - [8] Aman Y, Garnier V, Djurado E. Spark plasma sintering kinetics of pure α-alumina. J Am Ceram Soc 2011; 9: 2825 – 2833.
CR  - [9] Santanach JG, Weibel, A, Estourne’s, C, Yang Q, Laurent Ch, Peigney A. Spark plasma sintering of alumina: Study of parameters, formal sintering analysis and hypotheses on the mechanism(s) involved in densification and grain growth. Acta Mater 2011; 59: 1400 – 1408.
CR  - [10] Bernard-Granger G, Guizard C. Densification mechanism involved during spark plasma sintering of a codoped α-alumina material: Part I. Formal sintering analysis. J Mater Res 2009; 1: 179 – 186.
CR  - [11] Nixon RD, Davis RF. Diffusion-accommodated grain boundary sliding and dislocation glide in the creep of sintered alpha silicon carbide. J Am Ceram 1992; 7: 1786 – 1795.
CR  - [12] Guillion O. Effects of applied stress and heating rate on field assisted sintering. RHR Castro and K. van Benthem (eds.), Sintering, Engineering Materials 35 2013; 195 – 213.
CR  - [13] Chakravarty D, Chokshi AH, Nixon RD, Davis RF. Direct characterizing of densification mechanisms during spark plasma sintering. J Am Ceram Soc 2014; 3: 765-771.
CR  - [14] Eriksson, M.  Spark plasma sintering enhancing grain sliding, deformation and grain size control. Department of Materials and Environmental Chemistry, Stockholm University, PhD Thesis 2010.
CR  - [15] Guillon O, Langer J. Master sintering curve applied to the field-assisted sintering technique. J Mater Sci 2010; 45: 5191-5195.
CR  - [16] Gullion O, Gonzalez-Julian J, Dagatz B, Kessel T, Schierning G., Rathel J., Herrmann M. Field assisted sintering technology/spark plasma sintering: mechanisms, materials and technology developments. Adv Eng Mat 2014; 1-20.
UR  - https://doi.org/10.18038/aubtda.305182
L1  - https://dergipark.org.tr/en/download/article-file/309838
ER  -