JP2020527191A - 金属、非酸化物セラミックおよび別の酸化感受性材料の焼結方法 - Google Patents
金属、非酸化物セラミックおよび別の酸化感受性材料の焼結方法 Download PDFInfo
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Abstract
Description
本発明の範囲において、酸化感受性材料、特に金属性または非酸化物性セラミック性コンポーネントの緻密化(焼結)に際して、該酸化感受性材料が酸化されることなく、今まで慣用とされていた保護雰囲気または真空中での使用を省くことが可能であることが判明した。
さらに、本発明を幾つかの実施例に基づきより詳細に説明するが、これは広範な保護範囲を限定すべきではない。
Al粉末(Alfa Aesar社、約40μm)を、500MPaで一軸加圧し、引き続き300MPaで等方圧加圧して、8mmの直径および3mmの高さを有する円柱体にした(ペレット)。
Cu粉末(Alfa Aesar社、約40μm)を、500MPaで一軸加圧し、引き続き300MPaで等方圧加圧して、8mmの直径および3mmの高さを有する円柱体にした(グリーン体)。
焼結されたコンポーネントは、理論密度の70%の密度を有していた。対応する値は、アルキメデスの原理を使用することによって得られた。
Ti粉末(Alfa Aesar社、約40μm)を、500MPaで一軸加圧し、引き続き300MPaで等方圧加圧して、8mmの直径および3mmの高さを有する円柱体にした(グリーン体)。円柱状のグリーン体を、KBr(Alfa Aesar社)で被包した。その際、一般的に1mmから10mm、好ましくは2mmから4mmの間の金属ハロゲン塩の層厚が生じた。そのためにグリーン体を、そのグリーン体より大きな直径を有するKBrが充填された坩堝中に入れ、KBrで覆い、引き続き再び200MPaで加圧した。こうしてKBrで被包されたグリーン体を、さらに300MPaの圧力で冷間等方圧加圧した。
焼結されたコンポーネントは、理論密度の94%の密度を有していた。対応する値は、アルキメデスの原理を使用することによって得られた。
Ti3SiC2粉末(Alfa Aesar社、約40μm)を200MPaで8mmの直径を有する円柱体へと一軸加圧して、グリーン体とした。
本発明の範囲において、酸化感受性材料、特に金属性または非酸化物性セラミック性コンポーネントの緻密化(焼結)に際して、該酸化感受性材料が酸化されることなく、今まで慣用とされていた保護雰囲気または真空中での使用を省くことが可能であることが判明した。
さらに、本発明を幾つかの実施例に基づきより詳細に説明するが、これは広範な保護範囲を限定すべきではない。
Al粉末(Alfa Aesar社、約40μm)を、500MPaで一軸加圧し、引き続き300MPaで等方圧加圧して、8mmの直径および3mmの高さを有する円柱体にした(ペレット)。
Cu粉末(Alfa Aesar社、約40μm)を、500MPaで一軸加圧し、引き続き300MPaで等方圧加圧して、8mmの直径および3mmの高さを有する円柱体にした(グリーン体)。
焼結されたコンポーネントは、理論密度の70%の密度を有していた。対応する値は、アルキメデスの原理を使用することによって得られた。
Ti粉末(Alfa Aesar社、約40μm)を、500MPaで一軸加圧し、引き続き300MPaで等方圧加圧して、8mmの直径および3mmの高さを有する円柱体にした(グリーン体)。円柱状のグリーン体を、KBr(Alfa Aesar社)で被包した。その際、一般的に1mmから10mm、好ましくは2mmから4mmの間の金属ハロゲン塩の層厚が生じた。そのためにグリーン体を、そのグリーン体より大きな直径を有するKBrが充填された坩堝中に入れ、KBrで覆い、引き続き再び200MPaで加圧した。こうしてKBrで被包されたグリーン体を、さらに300MPaの圧力で冷間等方圧加圧した。
焼結されたコンポーネントは、理論密度の94%の密度を有していた。対応する値は、アルキメデスの原理を使用することによって得られた。
Ti3SiC2粉末(Alfa Aesar社、約40μm)を200MPaで8mmの直径を有する円柱体へと一軸加圧して、グリーン体とした。
Claims (11)
- 金属性および/または非酸化物性コンポーネントの焼結方法であって、
− 少なくとも1種の金属性および/または非酸化物性粉末を含むグリーン体を金属ハロゲン塩で完全に被包し、気密的に加圧し、引き続き
− 金属ハロゲン塩と一緒に焼結温度まで加熱する、
ことを特徴とする方法。 - 加圧を一軸加圧または冷間等方圧加圧で行う、請求項1に記載の方法。
- 加圧および被包を、最高200℃までの温度で、有利には室温で行う、請求項1または2に記載の方法。
- 加熱を、少なくとも、使用される金属ハロゲン塩が溶融する温度を上回るまで行う、請求項1から3のいずれか一つに記載の方法。
- 加熱を、1400℃の最高温度まで、好ましくは1200℃まで行う、請求項1から4のいずれか一つに記載の方法。
- N=群(Li、Na、K、Rb、Cs、Mg、Be、Ca、Ba)からの少なくとも1種の元素と、Z=群(F、Cl、Br、I)からの少なくとも1種の元素とを有する少なくとも1種の金属ハロゲン塩(NZ)またはその混合物を使用する、請求項1から5のいずれか一つに記載の方法。
- 加熱を、酸素の存在下で行う、請求項1から6のいずれか一つに記載の方法。
- 金属ハロゲン塩を冷却後に、焼結されたコンポーネントを取り出すことができるように液体中で少なくとも部分的に溶解させる、請求項6または7に記載の方法。
- 金属ハロゲン塩を、水または水溶液または短鎖アルコール中で溶解させる、請求項8に記載の方法。
- 金属ハロゲン塩で被包され加圧されたグリーン体を、溶融された金属ハロゲン塩浴へと直接加える、請求項1から9のいずれか一つに記載の方法。
- 金属ハロゲン塩で被包され加圧されたグリーン体を、最初に金属ハロゲン塩浴中に配置し、引き続き一緒に金属ハロゲン塩の溶融温度を上回る温度に加熱する、請求項1から9のいずれか一つに記載の方法。
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DE102017006659.0A DE102017006659A1 (de) | 2017-07-13 | 2017-07-13 | Verfahren zum Sintern von Metallen, nicht oxidischen Keramiken und anderen oxidationsempfindlichen Materialien |
DE102017006659.0 | 2017-07-13 | ||
PCT/DE2018/000179 WO2019011359A1 (de) | 2017-07-13 | 2018-06-08 | Verfahren zum sintern von metallen, nicht oxidischen keramiken und anderen oxidationsempfindlichen materialien |
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WO2019011359A1 (de) | 2019-01-17 |
EP3651921A1 (de) | 2020-05-20 |
US11065686B2 (en) | 2021-07-20 |
CN110997194B (zh) | 2022-04-26 |
CN110997194A (zh) | 2020-04-10 |
US20200171575A1 (en) | 2020-06-04 |
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