JP4237059B2 - 炭素質サポートへのタングステンボディまたはモリブデンボディの反応ろう付け - Google Patents
炭素質サポートへのタングステンボディまたはモリブデンボディの反応ろう付け Download PDFInfo
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Description
外径が約5.35インチ(13.59cm)、内径が約2インチ(5.08cm)を有するように機械加工された黒鉛リングを、外径がほぼ同じ(約5.25インチ)で、0.5インチ(1.3cm)の中央孔を有し、最大厚さが0.416インチ(1.06cm)のTZM(モリブデン合金)製ディスクに接合するために準備がなされる。TZMディスクは、平らな下部表面および傾斜が付けられた頂部表面を有しており、その厚さは、半インチの孔の領域部分における中央でより厚くなっている。黒鉛リングは、ほぼ等方性で中粒子の細密多孔性黒鉛である、CTEがモリブデンのCTEすなわち5.43×10-6/℃に比較的近い約6×10-6/℃のIG−610Uから機械加工されている。この黒鉛リングは、中央部分の厚さが約2インチであり、その外縁に向かって傾斜が付けられている。
概ね実施例1で示した手順が、直径2インチの黒鉛リングおよび類似のサイズのTZMディスクを使用して実施された。黒鉛リング基板および試験シリンダは、これらの平らな表面へのスラリーの塗布に続いて、図2に示した2工程のプロセスに従って反応焼結される。被覆済みの黒鉛サポートが、同じ真空状態の真空炉内に置かれ、先に説明した加熱スケジュールに極めて類似したものを使用して、約2時間30分の期間に渡って約1945℃の温度に加熱される。この反応焼結温度に達すると、この温度で約30分間の間、被覆済みサポートが保持される。次に加熱が中断され、実施例1の場合と基本的に同じスケジュールを使用して周囲温度まで炉が冷却される。
概ね実施例1で示した手順が、直径2インチの炭素−炭素複合材リングおよび類似サイズの単結晶Wディスクを使用して行われた。ろう付けスラリーは、99パートのエタノールと1パートのヒドロキシプロピルセルロースの溶体を使用して、アルコールすなわちエタノール中の粒子/粉末混合物から形成されている。この粉末混合物は、等しい重量パーセントのタングステンホウ化物とタングステン炭化物を使用して調合され、重量で6パートのセルロースアルコール溶体中で10パートのこの粉末混合物を得るように混合されている。
Claims (10)
- 理論上の最大密度の少なくとも80%の密度を有する、高密度タングステン(W)ボディまたは高密度モリブデン(Mo)ボディを炭素質サポートに接合して、x線を生成するターゲット陽極を形成する方法であって、
炭素質サポートボディへの接合に指定された1つの表面を有する高密度W金属ボディまたは高密度Mo金属ボディを提供することと、
空気が存在しない状態で少なくとも1300℃の高温に耐えることができ、前記金属ボディの前記指定表面と相補をなす表面を有する炭素質サポートボディを提供することと、
前記サポートボディの前記相補表面を、W、Mo、バナジウム(V)またはジルコニウム(Zr)のホウ化物である耐火金属ホウ化物の粒子と、ハフニウム(Hf)、Zr、MoまたはWの炭化物である金属炭化物の粒子の混合物からなる材料の層で被覆することと、
前記2つの相補表面を対置することと、
前記2つのボディの間に中間障壁が形成され、それにより前記サポートボディから前記金属ボディ中への炭素の拡散を抑制するとともに、前記高密度Wまたは高密度Mo金属ボディが前記炭素質サポートに共晶接合によって接合するように、反応ろう付け温度まで加熱することによって前記WまたはMo金属ボディを前記炭素質サポートボディに接合することと
を備えることを特徴とする方法。 - 前記混合物は、粒子耐火金属ならびに周期律表のIVb属およびVb属から選ばれた粒子活性金属を含有し、前記加熱することにより、前記金属ボディの金属、前記活性金属、炭素、前記金属ホウ化物、および前記活性金属と前記Wまたは前記Moとの間で形成された任意の化合物からなる溶体について共晶が形成される温度まで温度を上昇させることを特徴とする請求項1に記載の方法。
- 前記金属ボディはモリブデンボディであり、前記ホウ化物はMoホウ化物であり、前記炭化物はHfCであり、前記粒子混合物は、Hf粉末およびMo粉末を含有し、前記加熱することは、1865℃の温度にすることを特徴とする請求項1に記載の方法。
- 前記加熱することにより、前記金属ボディの金属、前記金属ホウ化物、炭素、前記活性金属、および前記活性金属とWまたはMoとの間で形成された任意の化合物からなる溶体の共晶温度まで上昇させることを特徴とする請求項3に記載の方法。
- 前記被覆した材料は、両方とも45μm以下の粒度を有する、タングステンホウ化物またはモリブデンホウ化物の粒子およびハフニウム炭化物またはジルコニウム炭化物の粒子を含有するアルコールスラリーであることを特徴とする請求項3に記載の方法。
- 元素Hfまたは元素Zrの箔からなる活性金属層は、前記2つの対置された相補表面間に挿入され、前記混合物は、元素Hf粉末または元素Zr粉末、および元素Mo粉末または元素W粉末も含有することを特徴とする請求項1乃至5に記載の方法。
- 前記被覆した材料は、重量で14%と20%の間の前記金属ホウ化物、重量で45%と56%の間の前記金属炭化物、重量で13%と19%の間の元素Hf粉末および/または元素Zr粉末、および13%から19%の元素Wまたは元素Moから基本的になる粒子混合物を含むことを特徴とする請求項6に記載の方法。
- 前記炭素質サポートボディは、黒鉛または炭素−炭素複合材であり、真空中で前記反応ろう付け温度まで加熱し、少なくとも15分間その温度が維持されている間、前記表面を互いに対置させるべく力が印加されることを特徴とする請求項1乃至7に記載の方法。
- 前記金属ボディは単結晶材料のボディであり、前記炭素質サポートボディは、前記金属ボディと対置して配置されることになる表面に対して横断して整列した炭素繊維を含有した炭素−炭素複合材であることを特徴とする請求項1乃至8に記載の方法。
- 前記金属ボディは、高密度Moボディであり、前記被覆することは、前記サポートボディの前記相補表面をMoホウ化物粒子、Hf炭化物粒子および/またはZr炭化物粒子、元素Mo粒子、ならびに元素Hf粒子および/または元素Zr粒子の混合物を含有する層で被覆し、前記2つの相補表面は、それらの間のHf金属箔またはZr金属箔と対置され、Mo、MoBならびにHfおよび/またはZrからなる溶体の共晶温度まで加熱され、MoならびにHfおよび/またはZrが前記炭素質サポートボディの表面の反応によって炭化物を形成するのに十分な時間、前記温度が維持されることを特徴とする請求項1に記載の方法。
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US09/900,252 US6554179B2 (en) | 2001-07-06 | 2001-07-06 | Reaction brazing of tungsten or molybdenum body to carbonaceous support |
PCT/US2002/020899 WO2003038857A1 (en) | 2001-07-06 | 2002-07-02 | Reaction brazing of tungsten or molybdenum body to carbonaceous support |
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JP2004523093A JP2004523093A (ja) | 2004-07-29 |
JP2004523093A5 JP2004523093A5 (ja) | 2007-12-13 |
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US (1) | US6554179B2 (ja) |
EP (1) | EP1407468B1 (ja) |
JP (1) | JP4237059B2 (ja) |
AT (1) | ATE305660T1 (ja) |
DE (1) | DE60206382T2 (ja) |
HK (1) | HK1065165A1 (ja) |
WO (1) | WO2003038857A1 (ja) |
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-
2001
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2002
- 2002-07-02 WO PCT/US2002/020899 patent/WO2003038857A1/en active IP Right Grant
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EP1407468A1 (en) | 2004-04-14 |
US20030006269A1 (en) | 2003-01-09 |
HK1065165A1 (en) | 2005-02-08 |
ATE305660T1 (de) | 2005-10-15 |
DE60206382T2 (de) | 2006-06-22 |
US6554179B2 (en) | 2003-04-29 |
DE60206382D1 (de) | 2005-11-03 |
WO2003038857A1 (en) | 2003-05-08 |
JP2004523093A (ja) | 2004-07-29 |
EP1407468B1 (en) | 2005-09-28 |
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