SAND AND DUST RESISTANT FILM

• Main Authors: KITAOKA Satoshi, YAMAZAKI Naoki, KAWASHIMA Naoki, ITO Taishi, TANAKA Makoto, KANAZAWA Shingo, HOSOYA Nagisa, NAKAMURA Takeshi, TANAKA Yuta
• Format: Patent
• Language: English; French; Japanese
• Published: 25.01.2024
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF NATURAL STONE

A film according to the preset invention, which protects a ceramic-based composite material from a high-temperature environment that contains sand and dust, is provided with an upper layer on at least one side that is exposed to the environment, the upper layer being formed of a substance which is represented by an average composition a(ReO1.5)b(AlO1.5)c(TrO2), wherein: 1 > a ≥ 0.5, b > 0 and c = 1 - (a + b) are satisfied; Re represents one or more rare earth elements; and Tr represents Hf or Zr. L'invention concerne un film qui protège un matériau composite à base de céramique vis-à-vis d'un environnement à haute température qui contient du sable et de la poussière, lequel film est pourvu d'une couche supérieure sur au moins un côté qui est exposé à l'environnement, la couche supérieure étant formée d'une substance qui est représentée par une composition moyenne a(ReO1,5 )b(AlO1,5)c(TrO2), dans laquelle : 1 > a ≥ 0,5, b > 0 et c = 1 - (a + b) sont satisfaits ; Re représente un ou plusieurs éléments des terres rares ; et Tr représente Hf ou Zr. 砂塵を含む高温環境からセラミックス基複合材料を保護する被膜は、少なくとも前記環境に露出する側に、平均組成ａ（ＲｅＯ１．５）ｂ（ＡｌＯ１．５）ｃ（ＴｒＯ２）により表される物質であって、１＞ａ≧０．５，ｂ＞０，ｃ＝１－（ａ＋ｂ）を満たし、Ｒｅは希土類元素の何れか１以上でありＴｒはＨｆまたはＺｒである物質よりなる上層を備える。