書誌事項
- タイトル別名
-
- Effect of Graded Pore Distribution on Thermal Insulation of Metal Foam
説明
Metal foams are attractive materials for thermal insulators because of their low thermal conductivity. Coefficient of thermal expansion (CTE) of metal foams is the same as that of cell wall materials. Therefore, the effect of thermal stress induced by a change in CTE, which is severe in the thermal barrier coating by ceramics, becomes negligible. In this study, we focus on designing metal foams as thermal insulators. The effect of porosity and pore shape on the thermal conductivity was calculated by micromechanical analysis. It was revealed that oblate spheroidal pores are effective to decrease the thermal conductivity. Micromechanical analysis also revealed that the thermal conductivity can be controlled by pore distribution of the metal foam. That is, metal foam with graded porosity has low thermal conductivity compared to uniform porosity. A diffusion-bonding process enabled to manufacture 5083 aluminum alloy preforms containing TiH2 particles as a foaming agent. Foaming test by directional heating enabled to manufacture closed-cell 5083 aluminum alloy foams having both oblate spheroidal pores and graded pore distribution.<br>
収録刊行物
-
- 日本金属学会誌
-
日本金属学会誌 72 (9), 758-762, 2008
公益社団法人 日本金属学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390001206478467584
-
- NII論文ID
- 130004456021
-
- COI
- 1:CAS:528:DC%2BD1cXht12ntLvM
-
- ISSN
- 18806880
- 24337501
- 00214876
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可
