Journal ArticleDOI
Microstructural control in the processing of electronic ceramics
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TLDR
In this paper, the influence of powder characteristics, dopant addition, sintering atmosphere, firing schedules and the intrinsic grain boundary properties on microstructural development are discussed, and it is concluded that particle coarsening and rapid grain growth during densification must be minimized, possibly by dopant additions and a control of the sinting atmosphere.About:
This article is published in Materials Science and Engineering.The article was published on 1981-04-01. It has received 169 citations till now. The article focuses on the topics: Grain growth & Sintering.read more
Citations
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Crack-Interface Grain Bridging as a Fracture Resistance I, Mechanism in Ceramics: I, Experimental Study on Alumina
TL;DR: In this paper, microscopic evidence is presented in support of an explanation of R-curve behavior in monophase ceramics by grain-localized bridging across the newly formed crack interface.
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Densification mechanisms in spark plasma sintering of nanocrystalline ceramics
TL;DR: In this article, the effect of the particle size on the possible electric discharge during the SPS was examined, and it was shown that the critical particle size for the electric discharge is both morphological and material dependent.
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Compensating Defects in Highly Donor-Doped BaTiO3
TL;DR: In this article, a single-phase Ba-Nb-doped BaTiO3 has been prepared with various Ba/(Ti + Nb) ratios such that single phase products will be obtained if the charged donor center is assumed to be compensated in turn by Ba vacancies, Ti vacancies, equal concentrations of the two cation vacancies, oxygen interstitials, or electrons.
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Abnormal growth of faceted (WC) grains in a (Co) liquid matrix
TL;DR: In this paper, it was shown that the abnormal grain growth (AGG) behavior is not linearly dependent on the driving force arising from the grain size difference, but the growth rate is expected to increase abruptly at a critical supersaturation.
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Current understanding and future research directions at the onset of the next century of sintering science and technology
TL;DR: Sintering and accompanying microstructural evolution is inarguably the most important step in the processing of ceramics and hard metals as mentioned in this paper, where an ensemble of particles is converted into a coherent object of controlled density and microstructure at an elevated temperature (but below the melting point) due to the thermodynamic tendency of the particle system to decrease its total surface and interfacial energy.
References
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The Impurity‐Drag Effect in Grain Boundary Motion
TL;DR: In this paper, the drag on a grain boundary produced by an impurity atmosphere is examined in detail, and is found to depend on the velocity of the grain boundary relative to the diffusivity of the impurity and its interaction with the grain boundaries.
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Sintering Crystalline Solids. II. Experimental Test of Diffusion Models in Powder Compacts
TL;DR: Coble et al. as mentioned in this paper showed that the grain size increases linearly with the logarithm of time, and the grain density increases with the one-third power of time.
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Agglomerate and Particle Size Effects on Sintering Yttria‐Stabilized Zirconia
TL;DR: In this article, the initial-, intermediate-, and final-stage sintering of fine crystallite yttria-stabilized zirconia was studied, and it was found that agglomerates limit attainable green density, interfere with the development of microstructure, impede initial-stage Sintering kinetics, and limit the potential benefit of the fine crystallites on final stage sinterings.
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Chemically induced grain boundary migration
Mats Hillert,Gary R. Purdy +1 more
TL;DR: In this paper, it was shown that gram boundary motion can be induced by changing the composition by means of grain boundary diffusion, and the experimental results can be used to evaluate rather directly the grain boundary diffusivity and mobility.
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Sintering of Covalent Solids
TL;DR: In this article, the sintering behavior of primarily covalently bonded β-SiC, Si, and Si3N4 was studied using surface area and densification measurements as well as observations of microstructures developed during firing.