Control of texture in alumina by colloidal processing in a strong magnetic field

Tohru Suzuki, Tetsuo Uchikoshi, Yoshio Sakka

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

Electrical, mechanical and other properties of ceramic materials can be controlled by designing their microstructures. It had generally been difficult to utilize a magnetic field for tailoring the microstructure in feeble magnetic ceramics, such as Al 2 O 3 ; however, the possibility of controlling the microstructure by a magnetic field occurred with the development of superconducting magnets. In this review paper, we introduce a novel processing for the microstructual design in ceramics by colloidal processing in a strong magnetic field and an electric field. We demonstrate that the textured alumina can be fabricated by slip casting in a strong magnetic field and the production of alumina/alumina laminar composites with different crystalline-oriented layers can be achieved by electrophoretic deposition in a strong magnetic field. In order to control the texture using a magnetic field, a good dispersion of powder in a suspension is necessary because a strong attractive force between the agglomerated particles prevents each particle in a suspension from rotating in the magnetic field. The degree of orientation depends on the processing factors, such as heating temperature, viscosity of suspension, etc. And the grain growth in Al 2 O 3 matrix enhances crystallographic texture development. The bending strength of the laminar composite depended on the direction of the multilayered microstructure with alternate crystalline-oriented layers. Crack propagation and fracture mode depend on the direction of microstructure in the laminar composite with controlled crystalline orientation.

Original languageEnglish
Pages (from-to)356-364
Number of pages9
JournalScience and Technology of Advanced Materials
Volume7
Issue number4
DOIs
Publication statusPublished - 2006 May 1
Externally publishedYes

Fingerprint

Aluminum Oxide
Alumina
Textures
Magnetic fields
Processing
Microstructure
Suspensions
Crystalline materials
Composite materials
Superconducting magnets
Ceramic materials
Grain growth
Crystal orientation
Bending strength
Powders
Crack propagation
Casting
Electric fields
Viscosity
Heating

Keywords

  • Alumina
  • EPD
  • Grain growth
  • Laminar composite
  • Orientation
  • Slip casting
  • Texture

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Control of texture in alumina by colloidal processing in a strong magnetic field. / Suzuki, Tohru; Uchikoshi, Tetsuo; Sakka, Yoshio.

In: Science and Technology of Advanced Materials, Vol. 7, No. 4, 01.05.2006, p. 356-364.

Research output: Contribution to journalArticle

@article{bdfedcc8614242a89d8548ed3530cf28,
title = "Control of texture in alumina by colloidal processing in a strong magnetic field",
abstract = "Electrical, mechanical and other properties of ceramic materials can be controlled by designing their microstructures. It had generally been difficult to utilize a magnetic field for tailoring the microstructure in feeble magnetic ceramics, such as Al 2 O 3 ; however, the possibility of controlling the microstructure by a magnetic field occurred with the development of superconducting magnets. In this review paper, we introduce a novel processing for the microstructual design in ceramics by colloidal processing in a strong magnetic field and an electric field. We demonstrate that the textured alumina can be fabricated by slip casting in a strong magnetic field and the production of alumina/alumina laminar composites with different crystalline-oriented layers can be achieved by electrophoretic deposition in a strong magnetic field. In order to control the texture using a magnetic field, a good dispersion of powder in a suspension is necessary because a strong attractive force between the agglomerated particles prevents each particle in a suspension from rotating in the magnetic field. The degree of orientation depends on the processing factors, such as heating temperature, viscosity of suspension, etc. And the grain growth in Al 2 O 3 matrix enhances crystallographic texture development. The bending strength of the laminar composite depended on the direction of the multilayered microstructure with alternate crystalline-oriented layers. Crack propagation and fracture mode depend on the direction of microstructure in the laminar composite with controlled crystalline orientation.",
keywords = "Alumina, EPD, Grain growth, Laminar composite, Orientation, Slip casting, Texture",
author = "Tohru Suzuki and Tetsuo Uchikoshi and Yoshio Sakka",
year = "2006",
month = "5",
day = "1",
doi = "10.1016/j.stam.2006.01.014",
language = "English",
volume = "7",
pages = "356--364",
journal = "Science and Technology of Advanced Materials",
issn = "1468-6996",
publisher = "IOP Publishing Ltd.",
number = "4",

}

TY - JOUR

T1 - Control of texture in alumina by colloidal processing in a strong magnetic field

AU - Suzuki, Tohru

AU - Uchikoshi, Tetsuo

AU - Sakka, Yoshio

PY - 2006/5/1

Y1 - 2006/5/1

N2 - Electrical, mechanical and other properties of ceramic materials can be controlled by designing their microstructures. It had generally been difficult to utilize a magnetic field for tailoring the microstructure in feeble magnetic ceramics, such as Al 2 O 3 ; however, the possibility of controlling the microstructure by a magnetic field occurred with the development of superconducting magnets. In this review paper, we introduce a novel processing for the microstructual design in ceramics by colloidal processing in a strong magnetic field and an electric field. We demonstrate that the textured alumina can be fabricated by slip casting in a strong magnetic field and the production of alumina/alumina laminar composites with different crystalline-oriented layers can be achieved by electrophoretic deposition in a strong magnetic field. In order to control the texture using a magnetic field, a good dispersion of powder in a suspension is necessary because a strong attractive force between the agglomerated particles prevents each particle in a suspension from rotating in the magnetic field. The degree of orientation depends on the processing factors, such as heating temperature, viscosity of suspension, etc. And the grain growth in Al 2 O 3 matrix enhances crystallographic texture development. The bending strength of the laminar composite depended on the direction of the multilayered microstructure with alternate crystalline-oriented layers. Crack propagation and fracture mode depend on the direction of microstructure in the laminar composite with controlled crystalline orientation.

AB - Electrical, mechanical and other properties of ceramic materials can be controlled by designing their microstructures. It had generally been difficult to utilize a magnetic field for tailoring the microstructure in feeble magnetic ceramics, such as Al 2 O 3 ; however, the possibility of controlling the microstructure by a magnetic field occurred with the development of superconducting magnets. In this review paper, we introduce a novel processing for the microstructual design in ceramics by colloidal processing in a strong magnetic field and an electric field. We demonstrate that the textured alumina can be fabricated by slip casting in a strong magnetic field and the production of alumina/alumina laminar composites with different crystalline-oriented layers can be achieved by electrophoretic deposition in a strong magnetic field. In order to control the texture using a magnetic field, a good dispersion of powder in a suspension is necessary because a strong attractive force between the agglomerated particles prevents each particle in a suspension from rotating in the magnetic field. The degree of orientation depends on the processing factors, such as heating temperature, viscosity of suspension, etc. And the grain growth in Al 2 O 3 matrix enhances crystallographic texture development. The bending strength of the laminar composite depended on the direction of the multilayered microstructure with alternate crystalline-oriented layers. Crack propagation and fracture mode depend on the direction of microstructure in the laminar composite with controlled crystalline orientation.

KW - Alumina

KW - EPD

KW - Grain growth

KW - Laminar composite

KW - Orientation

KW - Slip casting

KW - Texture

UR - http://www.scopus.com/inward/record.url?scp=33746892616&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33746892616&partnerID=8YFLogxK

U2 - 10.1016/j.stam.2006.01.014

DO - 10.1016/j.stam.2006.01.014

M3 - Article

VL - 7

SP - 356

EP - 364

JO - Science and Technology of Advanced Materials

JF - Science and Technology of Advanced Materials

SN - 1468-6996

IS - 4

ER -