JP6608580B2 - 超低熱伝導性及び摩耗性の高温tbcの構造及び製造方法 - Google Patents
超低熱伝導性及び摩耗性の高温tbcの構造及び製造方法 Download PDFInfo
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- JP6608580B2 JP6608580B2 JP2014079054A JP2014079054A JP6608580B2 JP 6608580 B2 JP6608580 B2 JP 6608580B2 JP 2014079054 A JP2014079054 A JP 2014079054A JP 2014079054 A JP2014079054 A JP 2014079054A JP 6608580 B2 JP6608580 B2 JP 6608580B2
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Classifications
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Description
Claims (10)
- タービン部品を含む遮熱コーティング系であって、
前記タービン部品は、
タービン部品基材と、
前記タービン部品基材の上に施工される少なくとも1つの遮熱コーティング層と、
を備え、
前記少なくとも1つの遮熱コーティング層は、イットリウム、ランタンおよびイッテルビウムのうちの1つまたは複数を含む少なくとも1つの希土類元素または希土類酸化物を含む材料を含み、
前記少なくとも1つの遮熱コーティング層は、
3.9重量%La、4.1重量%Yおよび残部ジルコニアを有する層;
5.9重量%La、2.7重量%Yおよび残部ジルコニアを有する層;
7.8重量%La、1.4重量%Yおよび残部ジルコニアを有する層;ならびに
30.5重量%イッテルビア、24.8重量%ランタナ、1.4重量%ハフニア、1.5重量%タンタラを、残部ジルコニアおよび不可避的不純物を有する層
のうちの1つまたは組合せから選択され、
前記遮熱コーティング層は、稠密縦割れを有し、粒径が0.5〜5μmの範囲にあって所定の粒径分布を有し、熱伝導性が2.2W/mKよりも25〜50%低く、破壊靭性が1.2MPam1/2 である、遮熱コーティング系。 - 前記少なくとも1つの遮熱コーティング層が上に施工される前記タービン部品基材に施工されるボンドコート層をさらに含む、請求項1記載の遮熱コーティング系。
- 前記ボンドコート層に隣接する内側層をさらに含み、前記内側層は、イットリア安定化ジルコニアを含む、請求項2記載の遮熱コーティング系。
- 前記遮熱コーティング層は、イットリア安定化ジルコニアを含む内側層およびボンドコート層のうちの1つまたは複数の上に施工される複数の遮熱コーティング層を含み、前記複数の層の少なくとも1つは、前記内側層よりも25〜50%低い熱伝導性を有する、請求項1乃至3のいずれか1項記載の遮熱コーティング系。
- 3.9重量%Laおよび4.1重量%Y、5.9重量%Laおよび2.7重量%Y、ならびに7.8重量%Laおよび1.4重量%Y、のうちの1つから選択されたLaおよびYとジルコニア残部とを含む外側層を含む、請求項4記載の遮熱コーティング系。
- 前記複数の遮熱コーティング層および前記外側層のうちの1つまたは複数は、30〜40重量%ランタナおよび30〜40重量%イッテルビアを含むLa−Yb−Zr酸化物を含む、請求項5記載の遮熱コーティング系。
- 前記遮熱コーティング層は、イットリア安定化ジルコニアを含む内側層およびボンドコート層のうちの1つまたは複数をさらに含む、請求項1乃至3のいずれか1項記載の遮熱コーティング系。
- タービン部品を含む遮熱コーティング系であって、
前記タービン部品は、
タービン部品基材と、
前記タービン部品基材の上に施工される遮熱コーティング層と、
を備え、
前記遮熱コーティング層は、ランタンおよびイッテルビウムのうちの1つまたは複数を含む少なくとも1つの希土類元素または希土類酸化物からなり、
前記遮熱コーティング層は、
3.9重量%Laおよび4.1重量%Yを有する層とジルコニア残部層;
5.9重量%Laおよび2.7重量%Yを有する層とジルコニア残部層;
7.8重量%Laおよび1.4重量%Yを有する層とジルコニア残部層;ならびに
30.5重量%イッテルビア、24.8重量%ランタナ、1.4重量%ハフニア、1.5重量%タンタラを有する層とジルコニアおよび不可避的不純物残部層
のうちの1つまたは組合せから選択され、
前記遮熱コーティング層は、熱伝導性が2.2W/mKよりも25〜50%低く、破壊靭性が1.2MPam1/2 である、遮熱コーティング系。 - タービン部品を含む遮熱コーティング系であって、
前記タービン部品は、
タービン部品基材と、
前記タービン部品基材の上に施工される少なくとも1つの遮熱コーティング層と、
を備え、
前記遮熱コーティング層は、イットリウム、ランタンおよびイッテルビウムのうちの1つまたは複数を含む少なくとも1つの希土類元素または希土類酸化物を含む材料からなり、
前記少なくとも1つの遮熱コーティング層は、
3.9重量%Laおよび4.1重量%Yを有する層とジルコニア残部層;
5.9重量%Laおよび2.7重量%Yを有する層とジルコニア残部層;
7.8重量%Laおよび1.4重量%Yを有する層とジルコニア残部層;ならびに
30.5重量%イッテルビア、24.8重量%ランタナ、1.4重量%ハフニア、1.5重量%タンタラを有する層とジルコニアおよび不可避的不純物残部層
のうちの1つまたは組合せから選択され、
前記遮熱コーティング層は、稠密縦割れを有し、粒径が0.5〜5μmの範囲にあって所定の粒径分布を有し、熱伝導性が2.2W/mKよりも25〜50%低く、破壊靭性が1.2MPam1/2 である、遮熱コーティング系。 - ジルコニアがイットリア安定化ジルコニア(YSZ)を含む、請求項9に記載の遮熱コーティング系。
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