JP2015172243A - 気密性希土類耐環境皮膜を溶射するための組成物及び方法 - Google Patents
気密性希土類耐環境皮膜を溶射するための組成物及び方法 Download PDFInfo
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Abstract
【解決手段】希土類ケイ酸塩系気密層は、気密性ミクロ組織を有する希土類ケイ酸塩を含む溶射皮膜を含む。耐環境皮膜は、ケイ素を含むボンドコート層、及び溶射によりボンドコート層上に堆積させた1以上の希土類ケイ酸塩系気密層を含む。この希土類ケイ酸塩系気密層は、気密性ミクロ組織を有する希土類ケイ酸塩を含む溶射皮膜を含む。極限環境で使用するための物品に、このような耐環境皮膜を備えてもよい。希土類ケイ酸塩系気密層を製造するための溶射原料。
【選択図】図2
Description
気密性(Yb,Y)2Si2O7層の懸濁液溶射を行うための1つの例示的な方法を以下に記載する。
原料を製造するための1つの例示的な方法を以下に記載する。出発粉末:St−Gobain製(Yb,Y)2Si2O7(DV1099−fines)。出発粉末を変性エタノール(Fisher A−407)中で湿式ミルでサイズを合わせる。粉砕したスラリーを変性エタノールで希釈して所望の濃度にする。界面活性剤(Alfa Aesar製PEI)を添加して懸濁液を安定化する。PEIを0.07%未満加える。懸濁液中で焼結助剤を混合する(1mol%のAl2O3(Alfa Aesar製、#44931)、2mol%のFe3O4(Sigma Aldrich製、#637106)及び1重量%のSiO2(Sigma Aldrich製、#381276))。サンプル原材料を表1に示す。サンプル原材料中の(Yb,Y)2Si2O7粒子の固体濃度及び粒径分布を表1に一覧にした。
本開示において用いるための例示的な溶射条件を以下並びに表2及び表3に記載する。各種材料及び方法は以下を含む。プラズマガン:Axial III(Northwest Mettech社(カナダ、バンクーバー)製)、HVOFガン:GTV−770.000−AUS(Genie Products、米国ノースカロライナ州ブレバード)、ペリスタルティックフィードポンプ:Watson Marlow、520シリーズEA、520SN/REH型。
本開示において用いるための例示的な熱処理条件を以下及び表4に記載する。サンプルは、空気炉内で処理した。
例示的な気密性水蒸気試験の例を以下に記載する。サンプルは、SiコートしたSiCボタン上の(Yb,Y)2Si2O7層を含む。雰囲気:PH2O=0.9気圧、PO2=0.1気圧、500時間試験、250サイクル。2時間サイクルを以下の通り実施した。室温で開始(約20℃)。サンプルを高温帯(1315℃)内に下ろす。1315℃で約106分間浸漬。サンプルを高温帯から引き上げる(室温)。室温で10分間浸漬(炉内でのサンプルは1315℃。サンプルを室温で10分間浸漬するときにサンプルを100℃未満まで冷却)。キャラクタリゼーション:Siボンドコート上の熱成長酸化物(TGO)層の厚さ。気密性基準:TGO≦約6μmのときに気密層。サンプルの各種条件及び態様を表5に記載する。
Claims (35)
- 理論密度の85%以上の密度を有する気密性ミクロ組織を有する希土類ケイ酸塩を含む溶射皮膜を含む、希土類ケイ酸塩系気密層。
- 前記気密性ミクロ組織が、約15%未満の体積気孔率を有する閉鎖気孔を含む、請求項1記載の希土類ケイ酸塩系気密層。
- 前記気密性ミクロ組織が稠密希土類ケイ酸塩相及び任意成分としてガラス質相を含む、請求項1記載の希土類ケイ酸塩系気密層。
- 前記溶射皮膜が約5μm〜約1200μmの厚さを有する、請求項1記載の希土類ケイ酸塩系気密層。
- 前記希土類ケイ酸塩が、イッテルビウム(Yb)、イットリウム(Y)、スカンジウム(Sc)、ルテチウム(Lu)、ランタン(La)、セリウム(Ce)、プラセオジム(Pr)、ネオジム(Nd)、サマリウム(Sm)、ジスプロシウム(Dy)、ホルミウム(Ho)、エルビウム(Er)、ツリウム(Tm)、ユウロピウム(Eu)、ガドリニウム(Gd)、テルビウム(Tb)、プロメチウム(Pm)及びこれらの混合物からなる群から選択される希土類元素を含む、請求項1記載の希土類ケイ酸塩系気密層。
- 前記希土類ケイ酸塩が、(Ybx,Y1-x)2Si2O7(式中、0≦x≦1)、(Yby−Y1-y)2SiO5(式中、0≦y≦1)又はこれらの混合物からなる群から選択される、請求項1記載の希土類ケイ酸塩系気密層。
- 前記希土類ケイ酸塩系気密層が、(Ybx,Y1-x)2Si2O7(式中、0≦x≦1)である第1の希土類ケイ酸塩を含む第1の層と、(Yby−Y1-y)2SiO5(式中、0≦y≦1)である第2の希土類ケイ酸塩を含む第2の層とを含む、請求項1記載の希土類ケイ酸塩系気密層。
- 第1の希土類ケイ酸塩が(Yb0.6Y0.4)2Si2O7であり、第2の希土類ケイ酸塩がY2SiO5である、請求項7記載の希土類ケイ酸塩系気密層。
- 前記希土類ケイ酸塩が、約90重量%〜約99.5重量%の溶射皮膜を含む、請求項1記載の希土類ケイ酸塩系気密層。
- 前記希土類ケイ酸塩の気密性ミクロ組織が、1種以上の酸化物を含む焼結助剤を用いてインサイツ又はエクスサイツで希土類ケイ酸塩を焼結させることにより形成される、請求項1記載の希土類ケイ酸塩系気密層。
- 前記焼結助剤が、金属鉄、Al2O3、Fe3O4、SiO2、Fe2O3及びLiYO2からなる群から選択される、請求項10記載の希土類ケイ酸塩系気密層。
- 複数の焼結助剤酸化物が、金属鉄、Al2O3、Fe3O4及びSiO2を含む、請求項10記載の希土類ケイ酸塩系気密層。
- ケイ素を含むボンドコート層と、
理論密度の85%以上の密度を有する気密性ミクロ組織を有する希土類ケイ酸塩を含む溶射皮膜を含む、溶射によりボンドコート層上に堆積させた1以上の希土類ケイ酸塩系気密層と
を含む、耐環境皮膜。 - 前記気密性ミクロ組織が、約15%未満の体積気孔率を有する閉鎖気孔を含む、請求項13記載の耐環境皮膜。
- 前記ボンドコート層が約1μm〜約200μmの厚さを有し、1以上の希土類ケイ酸塩系気密層が約5μm〜約1200μmの厚さを有する、請求項13記載の耐環境皮膜。
- 前記1以上の希土類ケイ酸塩系気密層が、第1の希土類ケイ酸塩を含む第1の層と、第2の希土類ケイ酸塩を含む第2の層とを含み、第1の層がボンドコート層と第2の層との間に堆積されている、請求項13記載の耐環境皮膜。
- 第1の希土類ケイ酸塩が(Ybx,Y1-x)2Si2O7(式中、0≦x≦1)であり、第2の希土類ケイ酸塩が(Yby−Y1-y)2SiO5(式中、0≦y≦1)である、請求項16記載の耐環境皮膜。
- 第1の希土類ケイ酸塩が(Yb0.6Y0.4)2Si2O7であり、第2の希土類ケイ酸塩がY2SiO5である、請求項16記載の耐環境皮膜。
- 前記ボンドコート層と1以上の希土類ケイ酸塩系気密層との間に堆積させた非気密層をさらに含む、請求項13記載の耐環境皮膜。
- セラミックマトリックス複合材を含む基材と、
ケイ素を含むボンドコート層と、ボンドコート層上に堆積させた請求項1記載の1以上の希土類ケイ酸塩系気密層とを含む、基材の表面に堆積させた耐環境皮膜と
を含む耐環境皮膜を有する、物品。 - 前記ボンドコート層と1以上の希土類ケイ酸塩系気密層との間に堆積させた非気密層をさらに含む、請求項20記載の物品。
- 前記物品が、燃焼器構成部品、タービン動翼、シュラウド、ノズル、熱シールド及びベーンからなる群から選択されるタービンエンジン構成部品を含む、請求項20記載の物品。
- 液体担体中に懸濁させた希土類ケイ酸塩及び1種以上の酸化物を含む焼結助剤を含む懸濁液を含み、懸濁液の溶射が、理論密度の85%以上の密度を有する気密性ミクロ組織を有する希土類ケイ酸塩を含む希土類ケイ酸塩系気密層を得るのに効果的である希土類ケイ酸塩系気密層を製造するための、溶射原料。
- 前記希土類ケイ酸塩が、イッテルビウム(Yb)、イットリウム(Y)、スカンジウム(Sc)、ルテチウム(Lu)、ランタン(La)、セリウム(Ce)、プラセオジム(Pr)、ネオジム(Nd)、サマリウム(Sm)、ジスプロシウム(Dy)、ホルミウム(Ho)、エルビウム(Er)、ツリウム(Tm)、ユウロピウム(Eu)、ガドリニウム(Gd)、テルビウム(Tb)、プロメチウム(Pm)及びこれらの混合物からなる群から選択される希土類元素を含む、請求項23記載の溶射原料。
- 前記希土類ケイ酸塩が、(Ybx,Y1-x)2Si2O7(式中、0≦x≦1)、(Yby−Y1-y)2SiO5(式中、0≦y≦1)又はこれらの混合物からなる群から選択される、請求項23記載の溶射原料。
- 前記懸濁液が、約1重量%〜約40重量%の希土類ケイ酸塩を含む、請求項23記載の溶射原料。
- 前記希土類ケイ酸塩が、約0.01μm〜約15μmの外径を有する粒子の形態である、請求項23記載の溶射原料。
- 前記懸濁液が、約5重量%未満の焼結助剤を含む、請求項23記載の溶射原料。
- 前記焼結助剤が、金属鉄、Al2O3、Fe3O4、SiO2及びFe2O3からなる群から選択される、請求項23記載の溶射原料。
- 前記複数の焼結助剤酸化物を含む懸濁液が、約0重量%〜約0.5重量%のAl2O3、約0.5重量%〜約2重量%のFe3O4及び約0重量%〜約2重量%のSiO2を含む、請求項23記載の溶射原料。
- 前記焼結助剤酸化物が、約5nm〜約3μm、約5nm〜約100nm、約30nm〜約70nmの外径を有する微粒子の形態である、請求項23記載の溶射原料。
- 前記液体担体が、アルコール、水及びこれらの混合物からなる群から選択される、請求項23記載の溶射原料。
- 界面活性剤をさらに含む、請求項23記載の溶射原料。
- 前記界面活性剤が、ポリエチレンイミン、ポリビニルピロリドン、ポリメタクリル酸の塩、及びセラミック加工に一般的な他の分散剤からなる群から選択される、請求項33記載の溶射原料。
- 請求項23記載の溶射原料を提供するステップと、
溶射原料に溶射工程を施して、理論密度の85%以上の密度を有する気密性ミクロ組織を有する希土類ケイ酸塩を含む希土類ケイ酸塩系気密層を製造するステップと
を含む希土類ケイ酸塩系気密層を製造するための、方法。
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JP2019533090A (ja) * | 2016-10-18 | 2019-11-14 | コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ | セラミック化合物を含む層を有する固体基材の表面をコーティングする方法、及び該方法で得られたコーティング基材 |
JP7271429B2 (ja) | 2016-10-18 | 2023-05-11 | コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ | セラミック化合物を含む層を有する固体基材の表面をコーティングする方法、及び該方法で得られたコーティング基材 |
JP2020536040A (ja) * | 2017-10-05 | 2020-12-10 | サフラン | 環境バリアによって保護された構成部品 |
JP7273810B2 (ja) | 2017-10-05 | 2023-05-15 | サフラン | 環境バリアによって保護された構成部品 |
JP2021513000A (ja) * | 2018-01-31 | 2021-05-20 | サン−ゴバン サントル ド レシェルシュ エ デテュド ユーロペアン | 環境バリア |
JP7324760B2 (ja) | 2018-01-31 | 2023-08-10 | サン-ゴバン サントル ド レシェルシュ エ デテュド ユーロペアン | 環境バリア |
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US20160108510A1 (en) | 2016-04-21 |
CA2883157C (en) | 2022-03-29 |
US9890089B2 (en) | 2018-02-13 |
JP6771861B2 (ja) | 2020-10-21 |
BR102015005327A2 (pt) | 2016-06-21 |
EP2918698A1 (en) | 2015-09-16 |
CA2883157A1 (en) | 2015-09-11 |
CN105002455A (zh) | 2015-10-28 |
EP2918698B1 (en) | 2019-10-16 |
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