Recovery of mechanical strength by surface crack disappearance via thermal oxidation for nano-Ni/Al2O3 hybrid materials

Maruoka, Daisuke; Nanko, Makoto

doi:10.1016/j.ceramint.2012.10.008

Cited by 37 publications

(34 citation statements)

References 23 publications

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“…Specimen preparation of 5 vol.% Ni/Al 2 O 3 nanocomposites was conducted in the following procedure as reported previously . A slurry mixture containing Ni(NO 3 ) 2 .6H 2 O (Kojundo Chemical Laboratory), α‐Al 2 O 3 (Taimei Chemicals, TM‐DAR, d = 0.14 μm) and distilled water was prepared by ball milling for 24 h in a plastic bottle with alumina balls (5 mm in diameter).…”

Section: Methodsmentioning

confidence: 99%

“…The authors' group has studied the self‐healing mechanism of nano‐Ni/Al 2 O 3 over the past decade . Oxidation of nano‐Ni particles in the matrix at high temperatures induced the formation of an internal oxidized zone and an external layer of oxidation product .…”

Section: Introductionmentioning

confidence: 99%

“…The internal oxidized zone, which is referred to the diffusion of O 2− , is representative for oxidation resistance of the composites. Maruoka et al . reported the recovery of bending strength achieved by crack healing after heat treatment in the air at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…Since the bending tests were conducted at room temperature in the previous study, self‐healing performance at high temperatures was still unknown. An investigation of high‐temperature bending strength on self‐healing Ni/Al 2 O 3 nanocomposites is necessary for applications of the nanocomposites at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

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High‐temperature Bending Strength of Self‐Healing Ni/Al₂O₃ Nanocomposites

Pham

Nanko

Nakao

2016

Int J Applied Ceramic Tech

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Bending strength of 5 vol.% Ni/Al2O3 composites as a function of testing temperature is investigated at temperatures ranging from room temperature to 1200°C. Self‐healing performance at high temperatures of the composites is evaluated by conducting high‐temperature bending tests for as‐sintered, as‐cracked, and as‐healed specimens. Bending strength of as‐sintered specimens dramatically decreases from 995 MPa at room temperature to 205 MPa at 1200°C. Additionally, the plastic deformation of the as‐sintered specimens occurs when the testing temperature reaches to 1200°C. The values of high‐temperature bending strength of as‐healed specimens are comparable with those of as‐sintered specimens. Similar to that of as‐sintered specimens, bending strength of as‐healed specimens degrades when the testing temperature increases. Results of the present study indicate that the recovery of bending strength by the self‐healing function is able to achieve at temperatures as high as 1200°C. Unlike the mechanical behaviors at high temperatures of as‐sintered and as‐healed specimens, the bending strength of as‐cracked specimens slightly increases with the increase of testing temperature. This phenomenon is attributed to the effect of the self‐healing mechanism during high‐temperature bending tests.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High‐temperature Bending Strength of Self‐Healing Ni/Al₂O₃ Nanocomposites

Pham

Nanko

Nakao

2016

Int J Applied Ceramic Tech

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“…An alternative method to enhance the healing ability is downsizing of the healing agent [16,17]. Nakao [21]. In order to achieve full healing at lower temperatures, Ti containing self-healing agents have been proposed.…”

Section: Introductionmentioning

confidence: 99%

On the use of TiC as high-temperature healing particles in alumina based composites

Yoshioka

Boatemaa

Zwaag

et al. 2016

Journal of the European Ceramic Society

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Please cite this article in press as: S. Yoshioka, et al., On the use of TiC as high-temperature healing particles in alumina based composites, J Eur Ceram Soc (2016), http://dx. a b s t r a c tWe report on the use of TiC particles as high temperature healing agent in alumina based composites. The selection of TiC was based on a theoretical analysis of its high temperature stability in contact with Al 2 O 3 , its volumetric expansion upon oxidation and the adhesion between the reaction product TiO 2 with Al 2 O 3 . Fully dense 15 and 30 vol.% TiC-Alumina composites were made by Spark Plasma Sintering. Initial damage was produced by Vickers indentations. The strength recovery was determined for temperatures between 400 and 800 • C. The mechanical measurements were complemented by microstructural characterization of the base material and the healed cracks.

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Self‐Healing Engineering Ceramics with Oxidation‐Induced Crack Repair

Greil

2019

Adv Eng Mater

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Engineering ceramics capable of restoring damage-induced surface cracking may achieve enhanced reliability and longer lifetime at high temperature applications compared with nonhealing ceramics. Selection of healing agents dispersed in ceramic matrix composites which upon oxidation with environmental oxygen may rapidly fill the volume of a surface crack and recover compromised strength are reviewed. Novel approaches envisage acceleration of crack healing to reduce healing period as well as healing temperature. Potential fields of application for self-healing ceramics operating at elevated service temperatures are presented.

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Recovery of mechanical strength by surface crack disappearance via thermal oxidation for nano-Ni/Al2O3 hybrid materials

Cited by 37 publications

References 23 publications

High‐temperature Bending Strength of Self‐Healing Ni/Al₂O₃ Nanocomposites

High‐temperature Bending Strength of Self‐Healing Ni/Al₂O₃ Nanocomposites

On the use of TiC as high-temperature healing particles in alumina based composites

Self‐Healing Engineering Ceramics with Oxidation‐Induced Crack Repair

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Recovery of mechanical strength by surface crack disappearance via thermal oxidation for nano-Ni/Al2O3 hybrid materials

Cited by 37 publications

References 23 publications

High‐temperature Bending Strength of Self‐Healing Ni/Al2O3 Nanocomposites

High‐temperature Bending Strength of Self‐Healing Ni/Al2O3 Nanocomposites

On the use of TiC as high-temperature healing particles in alumina based composites

Self‐Healing Engineering Ceramics with Oxidation‐Induced Crack Repair

Contact Info

Product

Resources

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High‐temperature Bending Strength of Self‐Healing Ni/Al₂O₃ Nanocomposites

High‐temperature Bending Strength of Self‐Healing Ni/Al₂O₃ Nanocomposites