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METHOD FOR PRODUCING BORON CARBIDE-CONTAINING CERAMIC JOINED BODY AND BORON CARBIDE-CONTAINING CERAMIC JOINED BODY
PROBLEM TO BE SOLVED: To provide a technique for obtaining a boron carbide-containing ceramic joined body in which when boron carbide-based ceramics are joined to each other, high joining strength can be achieved at a lower temperature, and also a joined portion of the obtained boron carbide-containing ceramic joined body has non-conventional excellent durability against long term use and which is therefore suitable for practical application.SOLUTION: The boron carbide-containing ceramic joined body is provided in which: boron carbide ceramic members containing 60 mass% or more of boron carbide are integrated via a joint layer composed of an aluminum-silicon alloy having a silicon content of 5 to 25 mass%; a joined portion has a strength of 100 MPa or more; the joint layer has a melting point lower than a melting point of aluminum of 660°C; a change in the volume of the joint layer which occurs when the joint layer solidifies from a molten state by cooling is 5.5% or less; and the joint layer has a thermal expansion coefficient of 18×10to 22×10(1/°C).
【課題】炭化ホウ素系セラミックス同士の接合をする場合に、より低い温度で高い接合強度を達成でき、得られる炭化ホウ素含有セラミックス接合体の接合部分が、従来にない、長時間の使用に対する耐久性にも優れる、実用化に適した炭化ホウ素含有セラミックス接合体を得る技術の提供。【解決手段】炭化ホウ素を６０質量％以上含む炭化ホウ素セラミックス部材同士が、シリコン含有率５質量％以上２５質量％以下のアルミニウム−シリコン合金からなる接合層を介して一体化されており、かつ、接合した部分の強度が１００ＭＰａ以上であり、前記接合層は、その融点が、アルミニウムの融点の６６０℃よりも低く、かつ、溶融状態から冷却により凝固する過程において生じる体積変化が５．５％以内であって、その熱膨張係数が１８?１０-6〜２２?１０-6（１／℃）である炭化ホウ素含有セラミックス接合体、及びその製造方法。【選択図】図１
METHOD FOR PRODUCING BORON CARBIDE-CONTAINING CERAMIC JOINED BODY AND BORON CARBIDE-CONTAINING CERAMIC JOINED BODY
PROBLEM TO BE SOLVED: To provide a technique for obtaining a boron carbide-containing ceramic joined body in which when boron carbide-based ceramics are joined to each other, high joining strength can be achieved at a lower temperature, and also a joined portion of the obtained boron carbide-containing ceramic joined body has non-conventional excellent durability against long term use and which is therefore suitable for practical application.SOLUTION: The boron carbide-containing ceramic joined body is provided in which: boron carbide ceramic members containing 60 mass% or more of boron carbide are integrated via a joint layer composed of an aluminum-silicon alloy having a silicon content of 5 to 25 mass%; a joined portion has a strength of 100 MPa or more; the joint layer has a melting point lower than a melting point of aluminum of 660°C; a change in the volume of the joint layer which occurs when the joint layer solidifies from a molten state by cooling is 5.5% or less; and the joint layer has a thermal expansion coefficient of 18×10to 22×10(1/°C).
【課題】炭化ホウ素系セラミックス同士の接合をする場合に、より低い温度で高い接合強度を達成でき、得られる炭化ホウ素含有セラミックス接合体の接合部分が、従来にない、長時間の使用に対する耐久性にも優れる、実用化に適した炭化ホウ素含有セラミックス接合体を得る技術の提供。【解決手段】炭化ホウ素を６０質量％以上含む炭化ホウ素セラミックス部材同士が、シリコン含有率５質量％以上２５質量％以下のアルミニウム−シリコン合金からなる接合層を介して一体化されており、かつ、接合した部分の強度が１００ＭＰａ以上であり、前記接合層は、その融点が、アルミニウムの融点の６６０℃よりも低く、かつ、溶融状態から冷却により凝固する過程において生じる体積変化が５．５％以内であって、その熱膨張係数が１８?１０-6〜２２?１０-6（１／℃）である炭化ホウ素含有セラミックス接合体、及びその製造方法。【選択図】図１
METHOD FOR PRODUCING BORON CARBIDE-CONTAINING CERAMIC JOINED BODY AND BORON CARBIDE-CONTAINING CERAMIC JOINED BODY
炭化ホウ素含有セラミックス接合体の製造方法及び炭化ホウ素含有セラミックス接合体
KITA HIDENORI (author) / KUMAZAWA TAKESHI (author) / SEKINE YOSHIHITO (author)
2015-09-07
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
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