JP2013241680A5 - - Google Patents
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- JP2013241680A5 JP2013241680A5 JP2013146038A JP2013146038A JP2013241680A5 JP 2013241680 A5 JP2013241680 A5 JP 2013241680A5 JP 2013146038 A JP2013146038 A JP 2013146038A JP 2013146038 A JP2013146038 A JP 2013146038A JP 2013241680 A5 JP2013241680 A5 JP 2013241680A5
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- foamable slurry
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- carrier sheet
- sintered body
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本発明は、金属焼結体の骨格により辺が構成されてなる複数の多面体状の空隙が相互に連続状態に形成されている板状の金属多孔質体の製造方法であって、金属粉末と発泡剤とを含有する発泡性スラリーを、キャリヤシート上に塗布し、前記キャリヤシートを移動させながら前記発泡性スラリーを薄板状に成形する成形工程と、薄板状に成形した発泡性スラリーを発泡および乾燥させてグリーンシートを形成する発泡乾燥工程と、前記グリーンシートを焼結して焼結体を形成する焼結工程と、前記焼結体を所定の厚さとなるまで厚さ方向に圧縮する圧縮工程と、を有し、前記成形工程において前記キャリヤシート上の前記発泡性スラリーの表裏面の少なくとも一方に凸部および凹部を形成することにより、前記グリーンシートの表裏面の少なくとも一方に凸部および凹部を形成し、このグリーンシートを焼結することにより前記焼結体の表裏面の少なくとも一方に凸部および凹部を形成し、前記圧縮工程において前記焼結体の少なくとも前記凸部の厚さが小さくなるように圧縮することにより、前記骨格の間に形成される空隙の空隙率が面方向に異なっている金属多孔質体を製造し、前記圧縮工程前の前記焼結体において、前記空隙率は６０％以上９９％以下、前記凸部と前記凹部との厚さの差は２０μｍ以上３ｍｍ以下、前記圧縮工程後の前記金属多孔質体において、前記空隙率は５０％以上９８％以下、前記最外面における前記空隙の開口率は５％以上９９％以下、前記最外面における前記空隙の平均開口径は３０μｍ以上１ｍｍ以下とする。 The present invention is a method for producing a plate-like metal porous body in which a plurality of polyhedral voids whose sides are constituted by a skeleton of a metal sintered body is formed in a continuous state, and a metal powder and A foaming slurry containing a foaming agent is applied onto a carrier sheet, and the foaming slurry is formed into a thin plate shape while moving the carrier sheet, and the foamable slurry formed into a thin plate shape is foamed and foamed. A foam drying process for forming a green sheet by drying, a sintering process for forming a sintered body by sintering the green sheet, and a compression for compressing the sintered body in a thickness direction until a predetermined thickness is achieved. And forming a convex portion and a concave portion on at least one of the front and back surfaces of the foamable slurry on the carrier sheet in the molding step, thereby reducing the front and back surfaces of the green sheet. In both cases, a convex portion and a concave portion are formed on one side, and the green sheet is sintered to form a convex portion and a concave portion on at least one of the front and back surfaces of the sintered body. By compressing so that the thickness of the convex portion is reduced, a metal porous body in which the porosity of the voids formed between the skeletons is different in the plane direction is manufactured, and the sintering before the compression step In the body, the porosity is 60% or more and 99% or less, the difference in thickness between the convex part and the concave part is 20 μm or more and 3 mm or less, and in the metal porous body after the compression step, the porosity is 50%. 98% or less, the opening ratio of the voids on the outermost surface is 5% or more and 99% or less, and the average opening diameter of the voids on the outermost surface is 30 μm or more and 1 mm or less .
この方法によれば、凸部および凹部を有する焼結体を所定の厚さに圧縮することにより、凹部を圧縮した部分に比較して凸部を圧縮した部分の空隙率が小さくなるので、面方向に密度分布を有する金属多孔質体を得ることができる。また、焼結体に除去加工を施して凸部および凹部を形成する場合には加工層の生成による目詰まりや表面の荒れが生じるおそれがあるが、本発明では焼結前に凸部および凹部を形成しているので、凸部および凹部を有する面を金属焼結体の骨格の側面により形成でき、加工層や表面の荒れが生じるおそれがない。
圧縮工程前において、空隙率を６０％以上としたのは内部の流体流通性を確保するためであり、空隙率を９９％以下としたのは金属多孔質体の強度を確保するためである。
また、前記圧縮工程前の前記焼結体において、前記凸部と前記凹部との厚さの差が２０μｍ以上３ｍｍ以下とすることにより、凸部および凹部の強度を確保することができる。
また、前記金属多孔質体の前記最外面における前記空隙の開口率が５％以上９９％以下、前記金属多孔質体の前記最外面における前記空隙の平均開口径が３０μｍ以上１ｍｍ以下とすることにより、内部の空隙への入口面積を確保でき、かつ金属多孔質体の強度を確保できる。
なお、この製造方法によって、凹部を圧縮しないように焼結体を圧縮することにより、圧縮後においても凸部の厚さが凹部の厚さよりも大きい金属多孔質体と、凹部を圧縮しないように焼結体を圧縮することにより、圧縮後の凸部の厚さが圧縮前の凹部の厚さと等しく、圧縮後の全体の厚さが均一である金属多孔質体と、焼結体を圧縮する際に凸部だけでなく凹部も圧縮することにより、圧縮後の全体の厚さが均一である金属多孔質体と、の３通りの金属多孔質体を製造することができる。
According to this method, by compressing the sintered body having the convex portion and the concave portion to a predetermined thickness, the porosity of the portion where the convex portion is compressed becomes smaller than the portion where the concave portion is compressed. A porous metal body having a density distribution in the direction can be obtained. In addition, when forming a convex portion and a concave portion by performing removal processing on the sintered body, there is a possibility that clogging or surface roughness may occur due to generation of a processed layer. Therefore, the surface having the convex part and the concave part can be formed by the side face of the skeleton of the sintered metal body, and there is no possibility that the processed layer and the surface are roughened.
The reason why the porosity is set to 60% or more before the compression step is to ensure the internal fluid flowability, and the reason why the porosity is set to 99% or less is to ensure the strength of the metal porous body.
Moreover, in the sintered body before the compression step, the strength of the convex portion and the concave portion can be ensured by setting the difference in thickness between the convex portion and the concave portion to 20 μm or more and 3 mm or less.
Further, the opening ratio of the voids on the outermost surface of the metal porous body is 5% or more and 99% or less, and the average opening diameter of the voids on the outermost surface of the metal porous body is 30 μm or more and 1 mm or less. In addition, the area of the entrance to the internal void can be secured, and the strength of the metal porous body can be secured.
In addition, by compressing a sintered compact so that a recessed part may not be compressed with this manufacturing method, the thickness of a convex part is larger than the thickness of a recessed part after compression, and a recessed part is not compressed. By compressing the sintered body, the thickness of the convex portion after compression is equal to the thickness of the concave portion before compression, and the whole thickness after compression is uniform, and the sintered body is compressed. In this case, by compressing not only the convex portions but also the concave portions, three types of metal porous bodies can be manufactured: a metal porous body having a uniform overall thickness after compression.
Claims (4)
金属粉末と発泡剤とを含有する発泡性スラリーを、キャリヤシート上に塗布し、前記キャリヤシートを移動させながら前記発泡性スラリーを薄板状に成形する成形工程と、
薄板状に成形した発泡性スラリーを発泡および乾燥させてグリーンシートを形成する発泡乾燥工程と、
前記グリーンシートを焼結して焼結体を形成する焼結工程と、
前記焼結体を所定の厚さとなるまで厚さ方向に圧縮する圧縮工程と、
を有し、
前記成形工程において前記キャリヤシート上の前記発泡性スラリーの表裏面の少なくとも一方に凸部および凹部を形成することにより、前記グリーンシートの表裏面の少なくとも一方に凸部および凹部を形成し、このグリーンシートを焼結することにより前記焼結体の表裏面の少なくとも一方に凸部および凹部を形成し、
前記圧縮工程において、前記焼結体の少なくとも前記凸部の厚さが小さくなるように圧縮することにより、
前記骨格の間に形成される空隙の空隙率が面方向に異なっている金属多孔質体を製造し、
前記圧縮工程前の前記焼結体において、前記空隙率は６０％以上９９％以下、前記凸部と前記凹部との厚さの差は２０μｍ以上３ｍｍ以下、
前記圧縮工程後の前記金属多孔質体において、前記空隙率は５０％以上９８％以下、前記最外面における前記空隙の開口率は５％以上９９％以下、前記最外面における前記空隙の平均開口径は３０μｍ以上１ｍｍ以下
とすることを特徴とする金属多孔質体の製造方法。 A method for producing a plate-like metal porous body in which a plurality of polyhedral voids whose sides are constituted by a skeleton of a metal sintered body is formed in a continuous state,
Forming a foamable slurry containing a metal powder and a foaming agent on a carrier sheet, and forming the foamable slurry into a thin plate shape while moving the carrier sheet;
A foaming and drying step of foaming and drying a foamable slurry formed into a thin plate to form a green sheet;
A sintering step of forming a sintered body by sintering the green sheet;
A compression step of compressing the sintered body in a thickness direction until a predetermined thickness is achieved;
Have
In the molding step, convex portions and concave portions are formed on at least one of the front and rear surfaces of the green sheet by forming convex portions and concave portions on at least one of the front and rear surfaces of the foamable slurry on the carrier sheet. By forming a convex part and a concave part on at least one of the front and back surfaces of the sintered body by sintering the sheet,
In the compression step, by compressing so that the thickness of at least the convex portion of the sintered body is reduced,
Producing a porous metal body in which the porosity of the voids formed between the skeletons is different in the plane direction ;
In the sintered body before the compression step, the porosity is 60% or more and 99% or less, and the difference in thickness between the convex part and the concave part is 20 μm or more and 3 mm or less,
In the metal porous body after the compression step, the porosity is 50% or more and 98% or less, the opening ratio of the void on the outermost surface is 5% or more and 99% or less, and the average opening diameter of the voids on the outermost surface. Is 30μm or more and 1mm or less
A method for producing a porous metal body, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013146038A JP5713058B2 (en) | 2013-07-12 | 2013-07-12 | Method for producing metal porous body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013146038A JP5713058B2 (en) | 2013-07-12 | 2013-07-12 | Method for producing metal porous body |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008265641A Division JP5439791B2 (en) | 2008-10-14 | 2008-10-14 | Method for producing metal porous body |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2013241680A JP2013241680A (en) | 2013-12-05 |
| JP2013241680A5 true JP2013241680A5 (en) | 2014-05-15 |
| JP5713058B2 JP5713058B2 (en) | 2015-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| JP2013146038A Expired - Fee Related JP5713058B2 (en) | 2013-07-12 | 2013-07-12 | Method for producing metal porous body |
Country Status (1)
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| JP (1) | JP5713058B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110612173A (en) * | 2017-05-16 | 2019-12-24 | 株式会社Lg化学 | Method for producing metal foam |
| JP2019163895A (en) * | 2018-03-19 | 2019-09-26 | ポーライト株式会社 | Manufacturing method of wick |
| JP2020140843A (en) * | 2019-02-28 | 2020-09-03 | 正己 奥山 | Electrode and method for manufacturing the same |
| JP7424134B2 (en) | 2020-03-17 | 2024-01-30 | 三菱マテリアル株式会社 | Composite titanium parts, electrodes for water electrolysis, and water electrolysis equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5331245B1 (en) * | 1968-06-18 | 1978-09-01 | ||
| JPH03220709A (en) * | 1990-01-26 | 1991-09-27 | Taiyo Yuden Co Ltd | Manufacture of laminated ceramic capacitor |
| JPH09111310A (en) * | 1995-10-20 | 1997-04-28 | Mitsubishi Materials Corp | Porous sintered metallic plate and its production |
| JP3396737B2 (en) * | 2001-03-01 | 2003-04-14 | 独立行政法人産業技術総合研究所 | Control method of porosity distribution of metallic porous body by combining electric discharge machining and plastic machining |
| JP2003181821A (en) * | 2001-12-19 | 2003-07-02 | Matsushita Electric Works Ltd | Forming method for inorganic board |
| JP4300855B2 (en) * | 2003-04-17 | 2009-07-22 | 三菱マテリアル株式会社 | Multi-porous material for fuel cell and fuel cell |
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