A critique of master sintering curve analysis. Issue 4 (April 2018)

• Record Type: Journal Article
• Authors: Frueh, T.; Ozer, I.O.; Poterala, S.F.; Lee, H.; Kupp, E.R.; Compson, C.; Atria, J.; Messing, G.L.
• Is Part Of: Journal of the European Ceramic Society. Volume 38:Issue 4(2018)
• Page Start: 1030
• Page End: 1037
• Publication Date: 2018-04
• Subjects: Master sintering curve (MSC) -- Sintering -- Alumina; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.12.025
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: In this work, we explore factors affecting the accuracy of the master sintering curve (MSC) approach for analyzing the complete sintering profile of ceramic powders. We show that the instantaneous anisotropic shrinkage must be accounted for to develop an accurate MSC. The MSC diverges at >90% density because of basic assumptions that oversimplify the analysis of the densification process. We also show that powder chemistry and forming techniques can affect the fitting parameter Q . Q should not be interpreted as the sintering activation energy, or used to interpret mechanistic differences since it is comprised of several mechanisms that influence densification throughout the sintering cycle. Despite these limitations, the MSC is a useful and practical tool for predicting thermal load (i.e. time and temperature) effects on the densification of a ceramic part fabricated from a singular powder that is fabricated by a singular forming process.