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Powers, James D.; Glaeser, Andreas M.

doi:10.1023/a:1008656302007

Cited by 105 publications

(21 citation statements)

References 44 publications

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“…Effects of impurities on the microstructure of polycrystalline material have long been studied for ceramics. Impurities have diverse effects on grain boundary migration (e.g., Powers & Glaeser, 1998;Yan et al, 1976) and it is difficult to find a universal theory. Impurities segregated to the grain boundaries exert a drag force and tend to slow down the grain boundary migration (e.g., Yan et al, 1976).…”

Section: Impurity Effects On Microstructurementioning

confidence: 99%

Effect of Impurities on Polycrystal Anelasticity

Takei

2022

JGR Solid Earth

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Section: Impurity Effects On Microstructurementioning

confidence: 99%

Effect of Impurities on Polycrystal Anelasticity

Takei

2022

JGR Solid Earth

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“…Also, chemical gradients, where the solid grains have differing compositions, accelerate boundary motion and coalescence [152].…”

Section: Neck Growthmentioning

confidence: 99%

Review: liquid phase sintering

2009

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Liquid phase sintering (LPS) is a process for forming high performance, multiple-phase components from powders. It involves sintering under conditions where solid grains coexist with a wetting liquid. Many variants of LPS are applied to a wide range of engineering materials. Example applications for this technology are found in automobile engine connecting rods and high-speed metal cutting inserts. Scientific advances in understanding LPS began in the 1950s. The resulting quantitative process models are now embedded in computer simulations to enable predictions of the sintered component dimensions, microstructure, and properties. However, there are remaining areas in need of research attention. This LPS review, based on over 2,500 publications, outlines what happens when mixed powders are heated to the LPS temperature, with a focus on the densification and microstructure evolution events.

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“…Grain growth in ceramics has been described in detail by Yan et al 17 Brook 18 and Powers et al 19 For the purpose of the present work, the most important concepts of grain boundary migration are reviewed qualitatively in the following section. For a more formal treatment, the reader is referred to the above-mentioned literature.…”

Section: Grain Growth In Ceramicsmentioning

confidence: 99%

Grain Growth of Micron-Sized Grains in Undoped and Cobalt Oxide Doped Ceria Solid Solutions

Jud

Huwiler

Gauckler

2006

J. Ceram. Soc. Japan

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Isothermal grain growth experiments have been conducted for undoped as well as cobalt oxide doped CeO 2 and Ce 0.8 Gd 0.2 O 1.9 CGO20 . Due to the solute drag effect of the dissolved gadolinium ions, the grain boundary mobility of CGO20 was significantly lower than that one of CeO 2 . The addition of cobalt oxide increases the grain boundary mobility of CGO20. This increase is assigned to the formation of a characteristic cobalt oxide rich grain boundary film. In undoped and cobalt oxide doped CGO20, a transition from regular grain growth at high temperature in micron-sized grains to self-limited grain growth at low temperature in nanometer-sized grains occurs. As a consequence, highly stable microstructures result at lower temperatures. It is suggested that strain in amorphous grain boundary films becomes important for the self limited grain growth for very small grains at low temperatures.

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Untitled

Cited by 105 publications

References 44 publications

Effect of Impurities on Polycrystal Anelasticity

Effect of Impurities on Polycrystal Anelasticity

Review: liquid phase sintering

Grain Growth of Micron-Sized Grains in Undoped and Cobalt Oxide Doped Ceria Solid Solutions

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