JP7090942B2 - 複合材 - Google Patents
複合材 Download PDFInfo
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- JP7090942B2 JP7090942B2 JP2020570788A JP2020570788A JP7090942B2 JP 7090942 B2 JP7090942 B2 JP 7090942B2 JP 2020570788 A JP2020570788 A JP 2020570788A JP 2020570788 A JP2020570788 A JP 2020570788A JP 7090942 B2 JP7090942 B2 JP 7090942B2
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- 239000002131 composite material Substances 0.000 title claims description 59
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/002—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
- B22F3/1134—Inorganic fillers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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Description
本出願は、2018年6月29日に出願された大韓民国特許出願第10-2018-0075959号に基づく優先権の利益を主張し、該当大韓民国特許出願の文献に開示されたすべての内容は本明細書の一部として組み込まれる。
本出願は、複合材に関する。
金属フォームとしては、銅金属フォームとして、表面に突起形態の酸化物が存在し、厚さが約90μm程度であり、気孔度が約65%~75%であるフィルム形状の銅フォームを用いた。前記銅フォームは、金属成分として平均粒径(D50粒径)が約10~20μm程度である銅(Cu)粉末を用い、分散剤として、α-テルピネオール(alpha-terpineol)を用い、バインダーとして、ポリ酢酸ビニル(Polyvinylacetate)を適用したスラリーで製造した。スラリーにおける金属成分(Cu)、分散剤及びバインダーの重量割合(Cu:分散剤:バインダー)は、1:1.11:0.09程度であった。前記スラリーを前記厚さのフィルムが形成されるようにコーティングし、約100℃の温度で約40分間乾燥した。その後、4%の水素/アルゴンガス雰囲気で前記フィルム形態の構造体を約900℃の温度で約1時間の間熱処理(焼結)し、有機成分を除去しながら金属成分を結合させて多孔性金属焼結体を製造した。焼結後に、焼結体を自然冷却させながら周囲温度が約500℃程度になった時点で酸素ガスを約400ppm~700ppmの範囲の濃度になるように注入し、周囲温度が常温(約25℃)になるまで酸素と接触させた。図1は、実施例1で製造されたシートに対する写真であり、写真から、金属フォームの表面に突起形態の酸化物が成長したことを確認することができる。前記突起形状の縦横比は、約1~3の範囲内であり、酸化物の面積割合は、約10%~30%程度であった。前記銅フォームを熱硬化性シリコン樹脂組成物(Dow corning、PDMS、Sylgard 183 Kit)に含浸させ、アプリケーターを用いて最終複合材の厚さが約110μm程度になるように過量の組成物を除去した。その後、前記材料を約120℃のオーブンに約10分位維持して硬化させることで、複合材を製造した。適用された高分子成分(シリコン樹脂)と金属フォーム(銅フォーム)それぞれの密度及び適用重量を基準で計算した結果、高分子成分の体積(PV)と金属フォームの体積(MV)の割合(MV/PV)は、約0.3程度であった。この複合材の熱伝導度は、約5.12W/mK程度であった。
熱硬化性シリコン樹脂組成物として、他の種類の組成物(Dow corning、PDMS、Sylgard 527 Kit)を用いたこと以外は、実施例1と同一の方式で複合材を製造した。製造された複合材の熱伝導度を上記言及された方式で測定した結果、約6.86W/mK程度であった。
熱硬化性シリコン樹脂組成物(Dow corning、PDMS、Sylgard 527 Kit)に板状型の窒化ホウ素粉末を約10重量%程度の割合で導入して用いたこと以外は、実施例2と同一の方式で複合材を製造した。製造された複合材の熱伝導度を上記言及された方式で測定した結果、約10.14W/mK程度であった。
Claims (13)
- 表面又は内部に金属酸化物が形成されている金属フォーム及び前記金属フォームの表面又は金属フォームの内部に存在する高分子成分を含み、
前記金属酸化物は、縦横比が1~8の範囲内である突起形状であり、
熱伝導度が0.4W/mK以上である、複合材。 - 金属フォームの表面に存在する金属酸化物の面積割合が5%~60%の範囲内である、請求項1に記載の複合材。
- 金属フォームの厚さ(MT)及び全体厚さ(T)の割合(T/MT)が2.5以下である、請求項1又は2に記載の複合材。
- 高分子成分の体積(PV)と金属フォームの体積(MV)の割合(MV/PV)は、10以下である、請求項1~3のいずれか一項に記載の複合材。
- 金属成分を含む金属構造体を焼結して多孔性金属焼結体を得るステップ、
前記焼結に続いて前記多孔性金属焼結体を酸素と接触させることにより、突起形状である金属酸化物を成長させるステップ、及び、
前記多孔性金属焼結体の表面又は内部に高分子成分を導入するステップ、
を含み、
前記突起形状である金属酸化物を成長させるステップは、前記金属構造体の焼結後に前記金属焼結体を冷却させるステップ、及び、前記冷却の過程で温度が300℃~600℃の範囲内になったときに前記金属焼結体を酸素と接触させるステップ、を含む、熱伝導度が0.4W/mK以上である複合材の製造方法。 - 金属構造体は、金属成分、分散剤及びバインダーを含むスラリーで製造する、請求項5に記載の複合材の製造方法。
- 分散剤は、アルコールである、請求項6に記載の複合材の製造方法。
- バインダーは、アルキルセルロース、ポリアルキレンカーボネート又はポリビニルアルコール化合物である、請求項6又は7に記載の複合材の製造方法。
- スラリーは、金属成分100重量部に対して、1~500重量部のバインダーを含む、請求項6~8のいずれか一項に記載の複合材の製造方法。
- スラリーは、バインダー100重量部に対して、10~2,000重量部の分散剤を含む、請求項6~9のいずれか一項に記載の複合材の製造方法。
- 酸素との接触は、320℃~600℃の温度で行う、請求項5~10のいずれか一項に記載の複合材の製造方法。
- 突起形状である金属酸化物を成長させるステップにおいて、金属焼結体を自然冷却させる、請求項5~11のいずれか一項に記載の複合材の製造方法。
- 酸素との接触は、1ppm~10,000ppmの酸素濃度下で行う、請求項5~12のいずれか一項に記載の複合材の製造方法。
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EP3815819B1 (en) | 2023-12-27 |
EP3815819A1 (en) | 2021-05-05 |
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WO2020005014A1 (ko) | 2020-01-02 |
KR20200002454A (ko) | 2020-01-08 |
CN112334254B (zh) | 2023-11-07 |
JP2021529255A (ja) | 2021-10-28 |
CN112334254A (zh) | 2021-02-05 |
EP3815819A4 (en) | 2021-08-04 |
KR20220006130A (ko) | 2022-01-14 |
KR102513847B1 (ko) | 2023-03-24 |
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