OPTIMIZED HIGH-TEMPERATURE THERMAL BARRIER

• Main Authors: GOLD MATTHEW, SCHMID RICHARD K, DORFMAN MITCHELL, XIE LIANGDE, DOESBURG JACOBUS C
• Format: Patent
• Language: English; Japanese
• Published: 11.06.2015
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; 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; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; DIFFUSION TREATMENT OF METALLIC MATERIAL; ENGINE PLANTS IN GENERAL; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; STEAM ENGINES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; WEAPONS

PROBLEM TO BE SOLVED: To provide improved high-temperature characteristics and abrasion characteristics in a coating of an abradable thermal barrier.SOLUTION: The present invention is directed to high-purity zirconia-based and/or hafnia-based materials and coatings for high-temperature cycling applications. Thermal barrier coatings made from the high-purity materials of the present invention has been found to have significantly improved sintering resistance relative to coatings made from current materials of lower purity. The materials of the present invention are high purity zirconia and/or hafnia partially or fully stabilized by one or any combinations of the following stabilizers: yttria, ytterbia, scandia, lanthanide oxide, and actinide oxide. Limits for impurity oxides, oxides other than the intended ingredients, that lead to significantly improved sintering resistance has been discovered. High purity coating structures suitable for high temperature cycling applications and for application onto a substrate is provided. 【課題】磨耗性断熱層被覆における改善された高温特性と磨耗特性を提供する。【解決手段】本発明は、高温サイクル用途の高純度ジルコニアベース及び／又はハフニアベースの材料及び被覆を対象とする。本発明の高純度材料からなる断熱層被覆は、現在の低純度の材料からなる被覆に比べて大幅に改善された焼結抵抗を有することが分かる。本発明の材料は、次の安定剤、すなわち、イットリア、イッテルビア、スカンジア、ランタノイド酸化物、及び、アクチノイド酸化物の１つ又は幾つかの組合せによって部分的に又は完全に安定化された高純度ジルコニア及び／又はハフニアである。不純物酸化物、すなわち、意図された成分以外の酸化物の限度は、大幅に改善された焼結抵抗をもたらすものであり、それが見いだされた。高温サイクル用及び基板上への適用に適した高純度被覆構造体が提供された。【選択図】図１