JP5953947B2 - 耐環境被覆されたセラミックス基複合材料部品及びその製造方法 - Google Patents
耐環境被覆されたセラミックス基複合材料部品及びその製造方法 Download PDFInfo
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Description
まず、実施例1、2の供試体の作製方法について説明する。なお、実施例1、2の供試体では、Si層の膜厚が相違しており、その他の構成は同じとした。
Si層と、3Al2O3・2SiO2とYb2SiO5との混合層と、HfO2層とを模擬した試験片を作製し、室温から1200℃の温度範囲で熱膨張測定を行った。
実施例1、2の供試体について水蒸気曝露試験を実施した。また比較例の供試体として、耐環境被覆していない基材(SiC/SiC複合材料で形成した基材のみのもの)についても水蒸気曝露試験を実施した。
実施例1、2の供試体についてバーナーリグ試験を実施した。まず、バーナーリグ試験方法について説明する。図7は、バーナーリグ試験の概略を示す図であり、図7(a)は、バーナーリグ試験装置50の概略構成を示す模式図であり、図7(b)は、1サイクルあたりの供試体表面温度サイクル条件を示す図である。
Claims (11)
- 耐環境被覆されたセラミックス基複合材料部品であって、
珪化物を含むセラミックス基複合材料で形成される基材と、
前記基材の表面に積層される炭化珪素層と、
前記炭化珪素層の表面に積層される珪素層と、
前記珪素層の表面に積層されるムライトと珪酸イッテルビウムとを混合した混合層と、
前記混合層の表面に積層される酸化物層と、
を備えることを特徴とするセラミックス基複合材料部品。 - 請求項1に記載のセラミックス基複合材料部品であって、
前記珪酸イッテルビウムは、Yb2SiO5またはYb2Si2O7であることを特徴とするセラミックス基複合材料部品。 - 請求項1または2に記載のセラミックス基複合材料部品であって、
前記炭化珪素層の膜厚は、10μm以上50μm以下であり、
前記珪素層の膜厚は、50μm以上140μm以下であり、
前記混合層の膜厚は、75μm以上225μm以下であることを特徴とするセラミックス基複合材料部品。 - 請求項3に記載のセラミックス基複合材料部品であって、
前記珪素層の膜厚は、50μm以上100μm以下であることを特徴とするセラミックス基複合材料部品。 - 請求項1から4のいずれか1つに記載のセラミックス基複合材料部品であって、
前記酸化物層は、酸化ハフニウム、珪酸ハフニウム、珪酸ルテチウム、珪酸イッテルビウム、酸化チタニウム、酸化ジルコニウム、チタン酸アルミニウム、珪酸アルミニウムおよびルテチウムハフニウム酸化物からなる群から選ばれる少なくとも1つを主成分とする酸化物で形成されることを特徴とするセラミックス基複合材料部品。 - 請求項5に記載のセラミックス基複合材料部品であって、
前記酸化物層は、単斜晶の酸化ハフニウムで形成されていることを特徴とするセラミックス基複合材料部品。 - 請求項1から6のいずれか1つに記載のセラミックス基複合材料部品であって、
前記基材は、炭化珪素繊維に炭化珪素マトリックスを複合化したセラミックス基複合材料で形成されていることを特徴とするセラミックス基複合材料部品。 - 請求項1から7のいずれか1つに記載のセラミックス基複合材料部品であって、
前記セラミックス基複合材料部品は、部品表面温度が1200℃から1400℃、水蒸気分圧が30kPaから140kPaの環境下で使用されることを特徴とするセラミックス基複合材料部品。 - 耐環境被覆されたセラミックス基複合材料部品の製造方法であって、
珪化物を含むセラミックス基複合材料で基材を形成する基材形成工程と、
前記基材の表面に炭化珪素層を化学蒸着法で積層する炭化珪素層積層工程と、
前記炭化珪素層の表面に珪素層を減圧溶射法で積層する珪素層積層工程と、
前記珪素層の表面にムライトと珪酸イッテルビウムとを混合した混合層を減圧溶射法で積層する混合層積層工程と、
前記混合層の表面に酸化物層を大気溶射法で積層する酸化物層積層工程と、
を備えることを特徴とするセラミックス基複合材料の製造方法。 - 請求項9に記載のセラミックス基複合材料の製造方法であって、
前記炭化珪素層積層工程は、前記炭化珪素層を10μm以上50μm以下の膜厚で積層し、
前記珪素層積層工程は、前記珪素層を50μm以上140μm以下の膜厚で積層し、
前記混合層積層工程は、前記混合層を75μm以上225μm以下の膜厚で積層することを特徴とするセラミックス基複合材料の製造方法。 - 請求項10に記載のセラミックス基複合材料の製造方法であって、
前記珪素層積層工程は、前記珪素層を50μm以上100μm以下の膜厚で積層することを特徴とするセラミックス基複合材料の製造方法。
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