What We Should Consider for Full Densification when Sintering

Suk-Joong L. Kang

doi:10.3390/ma13163578

What We Should Consider for Full Densification when Sintering

Materials ◽

10.3390/ma13163578 ◽

2020 ◽

Vol 13 (16) ◽

pp. 3578

Author(s):

Suk-Joong L. Kang

Keyword(s):

Grain Growth ◽

Powder Compact ◽

Growth Control ◽

Full Densification

To fully densify a powder compact, we should avoid two things: (i) entrapment of insoluble gases within pores and (ii) entrapment of isolated pores within grains. This paper describes general directions for promoting full densification in view of the above two points. Emphasis is placed on ways to potentially prevent pore entrapment in terms of grain growth control. Currently available techniques that can enhance densification while suppressing grain growth are briefly described, and their major mechanisms are discussed.

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Active grain growth control with distributed heating

Acta Materialia ◽

10.1016/j.actamat.2019.10.016 ◽

2020 ◽

Vol 183 ◽

pp. 301-312

Author(s):

Chengjian Zheng ◽

Yixuan Tan ◽

John T. Wen ◽

Antoinette M. Maniatty

Keyword(s):

Grain Growth ◽

Growth Control ◽

Distributed Heating

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Thermodynamics versus kinetics of grain growth control in nanocrystalline zirconia

Acta Materialia ◽

10.1016/j.actamat.2017.07.005 ◽

2017 ◽

Vol 136 ◽

pp. 224-234 ◽

Cited By ~ 16

Author(s):

Nazia Nafsin ◽

Jeffery A. Aguiar ◽

Toshihiro Aoki ◽

Andrew M. Thron ◽

Klaus van Benthem ◽

...

Keyword(s):

Grain Growth ◽

Growth Control ◽

Nanocrystalline Zirconia ◽

Kinetics Of

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Grain Growth Control during Reaction-Sintering of Sodium-Beta"-Alumina

Materials Science Forum ◽

10.4028/www.scientific.net/msf.94-96.839 ◽

1992 ◽

Vol 94-96 ◽

pp. 839-848

Author(s):

R. Hartung ◽

Ch. Koepp

Keyword(s):

Grain Growth ◽

Growth Control ◽

Reaction Sintering ◽

Sodium Beta Alumina ◽

Beta Alumina

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The selection of grain-growth control additives for the sintering of ceramics

Mineralogical Magazine ◽

10.1180/minmag.1970.037.291.08 ◽

1970 ◽

Vol 37 (291) ◽

pp. 833-838 ◽

Cited By ~ 12

Author(s):

D. W. Budworth

Keyword(s):

Grain Boundary ◽

Grain Growth ◽

Growth Control ◽

Boundary Films ◽

Selection Of

SummaryThe close interrelation between sintering and grain growth is discussed critically, and the necessity for control, but not suppression, of grain growth is established. A distinction between discontinuous and exaggerated grain growth is drawn, and the superiority of grain boundary films as grain-growth control agents is demonstrated. Work on the establishment of tentative criteria for the selection of grain-growth control additives for alumina is reviewed and discussed, and the extension of these ideas to the selection of NaF as a successful aid for magnesia is described.

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Grain growth control and transparency in spark plasma sintered self-doped alumina materials

Scripta Materialia ◽

10.1016/j.scriptamat.2009.07.026 ◽

2009 ◽

Vol 61 (10) ◽

pp. 931-934 ◽

Cited By ~ 18

Author(s):

M. Suárez ◽

A. Fernández ◽

J.L. Menéndez ◽

R. Torrecillas

Keyword(s):

Grain Growth ◽

Growth Control ◽

Spark Plasma

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Hot Extrusion of Nanostructured Al-Powder Alloys: Grain Growth Control and the Effect of Process Parameters on Their Microstructure and Mechanical Properties

Metallurgical and Materials Transactions A ◽

10.1007/s11661-009-9984-0 ◽

2009 ◽

Vol 40 (13) ◽

Cited By ~ 7

Author(s):

A.M. Jorge ◽

M.M. Peres ◽

J.B. Fogagnolo ◽

C.S. Kiminami ◽

C. Bolfarini ◽

...

Keyword(s):

Mechanical Properties ◽

Grain Growth ◽

Process Parameters ◽

Growth Control ◽

Hot Extrusion ◽

Powder Alloys ◽

Microstructure And Mechanical Properties ◽

Al Powder

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Densification and Grain Growth in Cu/AlN Mixed Ultrafine Powder Compact during Sintering

Journal of the Japan Institute of Metals and Materials ◽

10.2320/jinstmet1952.60.6_607 ◽

1996 ◽

Vol 60 (6) ◽

pp. 607-615 ◽

Cited By ~ 1

Author(s):

Masamichi Udaka ◽

Kazuhiro Kawasaki ◽

Takao Yamazaki ◽

Minoru Umemoto

Keyword(s):

Grain Growth ◽

Powder Compact ◽

Ultrafine Powder

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Grain Growth Control of Dielectric and Magnetic Ceramics

Ceramist ◽

10.31613/ceramist.2021.24.3.04 ◽

2021 ◽

Vol 24 (3) ◽

pp. 260-272

Author(s):

Kyoung-Seok Moon

Keyword(s):

Growth Rate ◽

Grain Growth ◽

Driving Force ◽

Growth Control ◽

Interface Reaction ◽

Ceramic Materials ◽

Interface Energy ◽

Diffusion Control ◽

Interface Mobility ◽

Interface Curvature

The sintering process transported the atoms in the materials by decreasing the total interface energy. The microstructure changes as a result of grain growth and densification under the capillary driving force due to the interface curvature among grains. The grain growth rate is expressed as the product of the interface mobility and the driving force. According to grain growth theories, the mobility of the interface governed by diffusion control is constant but interface mobility is nonlinear when the movement of an interface is governed by interface reaction. As the growth rate is nonlinear for the regime of interface reaction control, the grain growth is nonstationary with annealing time. The microstructure can be controlled by changing the growth rate of an individual grain with the correlation between the maximum driving force and the critical driving force for appreciable growth. The present paper discusses applications of the principle in the fabrication of dielectric and magnetic ceramic materials.

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