JPS5837146A - Coating composition - Google Patents

Coating composition

Info

Publication number
JPS5837146A
JPS5837146A JP57137165A JP13716582A JPS5837146A JP S5837146 A JPS5837146 A JP S5837146A JP 57137165 A JP57137165 A JP 57137165A JP 13716582 A JP13716582 A JP 13716582A JP S5837146 A JPS5837146 A JP S5837146A
Authority
JP
Japan
Prior art keywords
coating
hafnium
yttrium
substrate
coatings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP57137165A
Other languages
Japanese (ja)
Other versions
JPH0372706B2 (en
Inventor
デヴイツド・スコツト・デユヴアル
デイネツシユ・クマ−・グプタ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RTX Corp
Original Assignee
United Technologies Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United Technologies Corp filed Critical United Technologies Corp
Publication of JPS5837146A publication Critical patent/JPS5837146A/en
Publication of JPH0372706B2 publication Critical patent/JPH0372706B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/073—Metallic material containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/10—Inorganic compounds or compositions
    • C30B29/52—Alloys
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B33/00—After-treatment of single crystals or homogeneous polycrystalline material with defined structure

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は、被覆がハフニウムを含有しない超合金基質に
対し着装される場合に特に有用である改良されたＮ１Ｃ
ｒＡＩＹ又はＮｉ　Ｃｏ　Ｏｒ　Ａｔ　Ｙ被覆に係る。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an improved N1C coating that is particularly useful when the coating is applied to a hafnium-free superalloy substrate.
It concerns rAIY or Ni Co Or At Y coating.

本発明の本質は被覆内のイツトリウムの含有量を従来よ
り使用されている含有量以上のレベルに増大することで
ある。The essence of the invention is to increase the content of yttrium in the coating to levels above those previously used.

Ｎｉ　Ｃｒ　ＡＩ　Ｙ被覆及びＮｉ　Ｃｏ　Ｃｒ　ＡＩ
　Ｙ被覆の基質保護能力は、それらの外面上に薄いアル
ミナの層を形成（及び繰返し形成）することができるこ
とより引出される。酸化及び高温腐食に抵抗するのはか
かるアルミナ層である。アルミナの密着性を向上させ且
その剥離傾向を低減すべく、被覆に対しイツトリウムの
如き酸素活性元素が添加される。またアルミナの密着性
を改善すべくハフニウムも添加されてよい。Ni Cr AI Y coating and Ni Co Cr AI
The substrate protection ability of Y coatings derives from their ability to form (and repeatedly form) thin layers of alumina on their outer surfaces. It is such an alumina layer that resists oxidation and hot corrosion. Oxygen active elements such as yttrium are added to the coating to improve the adhesion of the alumina and reduce its tendency to peel. Hafnium may also be added to improve the adhesion of alumina.

本発明は、超合金及び被覆の技術分野に於ける一連の開
発動向からすれば、従来技術より容易に考えられ得るも
のではない。開発の初期段階に於ては、超合金はいわゆ
る等軸品にて使用され、また被覆されずに又はアルミナ
イド被覆の如き簡単な被覆が施された状態で使用されて
いた。超合金に対する性能の条件が厳しくなるにつれて
、超合金及び被覆の技術分野に於ても改善が行なわれ、
超合金の技術分野に於ては、超合金が結晶組織学的に一
方向に配向された細長い結晶粒として凝固せしめられる
いわゆる一方向凝固法の開発によって著しい改善がなさ
れた。このことが本願出願人と同一の譲受人に譲渡され
た米国特許第３．２６０．５０５号に記載されている。The present invention is no more readily conceivable than the prior art in view of the development trend in the superalloy and coating art. In the early stages of development, superalloys were used in so-called equiaxed products, either uncoated or with simple coatings such as aluminide coatings. As performance requirements for superalloys become more stringent, improvements are being made in the superalloy and coating technology.
Significant improvements have been made in the field of superalloy technology with the development of the so-called unidirectional solidification process in which superalloys are solidified as elongated grains that are crystallographically oriented in one direction. This is described in commonly assigned US Pat. No. 3,260,505.

また被覆の技術分野に於ては、はぼこれと同時にＭＣｒ
ＡＩＹ型のオーバーレイ被覆が開発された。かかる被覆
は従来より使用されていたアルミナイド被覆よりも保護
性能に優れたものである。米国特許第３，５４２．５３
０号、同第３．６７６．０８５号、同第３．７５４．９
０３号、同第３．９２８．０２６号はＭＣｒＡＩＹオー
バーレイ被覆に関するものである。In addition, in the technical field of coating, MCr
An AIY type overlay coating has been developed. Such coatings provide better protection than the previously used aluminide coatings. U.S. Patent No. 3,542.53
No. 0, No. 3.676.085, No. 3.754.9
No. 03, No. 3.928.026 relates to MCrAIY overlay coatings.

一方向凝固法は有望なものではあるが、横方向の延性に
関して重大な問題が発生した。一方向に配向された細長
い結晶粒を分離する粒界は結晶粒の配向軸線に垂直な方
向に於て極めて弱いことが発見された。この問題は同じ
く本願出願人と同一の譲受人に譲渡された米国特許第３
．７１１．３３７号に記載されている如く、合金に対し
少量（０，５〜２％）のハフニウムを添加することによ
って解決された。Although the unidirectional solidification method is promising, significant problems have arisen with respect to transverse ductility. It has been discovered that the grain boundaries separating elongated grains oriented in one direction are extremely weak in the direction perpendicular to the grain orientation axis. This issue also arises from U.S. Pat.
．． The problem was solved by adding small amounts (0.5-2%) of hafnium to the alloy, as described in No. 711.337.

ハフニウムを添加することによって修正された一方向凝
固された物品の開発とＭＣｒＡＩＹオーバーレイ被覆の
開発とが同一の実験室に於てほぼ同時に行なわれたので
、当然これらが組合せて使用された。また要求の厳しい
用途、特に第一段のタービンブレードに於ては当然の如
く、ハフニウムを添加することにより修正され一方向凝
固され７た基質とＭＣｒ　ＡＩ　Ｙオーバーレイ被覆と
が使用されている。Since the development of the directionally solidified article modified by the addition of hafnium and the development of the MCrAIY overlay coating were carried out in the same laboratory at approximately the same time, they were naturally used in combination. Also, in demanding applications, particularly first stage turbine blades, directionally solidified substrates modified by the addition of hafnium and MCr AI Y overlay coatings are of course used.

一方向凝固されたハフニウムを含有する柱状晶基質に着
装されるＭＣｒＡＩＹ被覆は組成に関し最適化された。A MCrAIY coating applied to a columnar substrate containing directionally solidified hafnium was optimized with respect to composition.

重量で約０．５％又は０．７％以上のレベルのイツトリ
ウムは、被覆−基質界面に好ましからざる低融点の相（
イツトリウムとハフニウムとに基く相である）を発生す
ることが解った。Yttrium at levels above about 0.5% or 0.7% by weight creates an undesirable low melting point phase at the coating-substrate interface (
It was found that a phase based on yttrium and hafnium) was generated.

柱状晶物品を越える進歩は米国特許第３，４９４．７０
９号に記載されている如く、上述の一方向凝固法と同様
であるがそれよりも進歩した凝固法を使用して単結晶物
品を製造することである。Advances over columnar crystalline articles are made in U.S. Pat. No. 3,494.70.
No. 9, a solidification method similar to, but more advanced than, the unidirectional solidification method described above is used to produce single crystal articles.

かかる単結晶物品はその内部に結晶粒界を含んでおらず
、従って柱状□晶物品の場合に発生する横方向の延性の
問題のないものである。従って延性の問題を改善すべく
合金にハフニウムを添加する必要がなく、事実単結晶超
合金物品の熱処理性を改善するためにはハフニウムを排
除することが望ましいことが解っている。このことが本
願出願人と同一の譲受人に譲渡された米国特許第４．１
１６゜７２３号に記載されている。Such single crystal articles do not contain grain boundaries within them and therefore are free from the lateral ductility problems that occur with columnar □ crystal articles. Therefore, there is no need to add hafnium to the alloy to improve ductility problems, and in fact its elimination has been found to be desirable to improve the heat treatability of single crystal superalloy articles. 4.1, which was assigned to the same assignee as the applicant.
No. 16°723.

本発明は基質材料中のハフニウムが被覆の性能を向上さ
せる点及び横方向延性の問題を改善する点に於て重要な
役割を演じ、また既に開発されていたＮ１ＣｒＡＩＹ被
覆及びＮｉ　Ｃｏ　Ｃｒ　ＡＩ　Ｙ被覆が大きく改善さ
れるという事実の認識より生み出されたものである。The present invention shows that hafnium in the matrix material plays an important role in improving the performance of the coating and improving the lateral ductility problem, and also improves the already developed N1CrAIY coating and NiCoCrAIY coating. This was created out of recognition of the fact that this would greatly improve the situation.

本発明の被覆組成物は１０〜３５％Ｃｒ、８〜２０％Ａ
１．０〜３０％Ｇｏ、１．１〜３．０％Ｙ１残部はぼＮ
ｉなる広い組成範囲を有するものである。かかる種類の
被覆に従来より使用されているレベル以上のイツトリウ
ムを使用することにより、耐酸化性が改善される。本発
明による被覆はハフニウムを故意には添加されていない
基質に対し使用されるに特に適したものである。The coating composition of the present invention has 10-35% Cr, 8-20% A
1.0-30% Go, 1.1-3.0% Y1 the remainder is N
It has a wide composition range of i. Oxidation resistance is improved by using yttrium at levels above those traditionally used in these types of coatings. The coating according to the invention is particularly suitable for use on substrates to which hafnium has not been deliberately added.

以下に添付の図を参照しつつ、本発明を実施例について
詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will be explained in detail below by way of example embodiments with reference to the accompanying figures.

本発明は、ある環境の下ではＮｉ　Ｃｏ　Ｃｒ　ＡＩＹ
被覆内のイツトリウムの量を従来技術により示されてい
る置部上に増大することが有効であるという発見に基く
ものである。イツトリウム含有量のａいＮｉ　Ｃｏ　Ｃ
ｒ　Ａｔ　Ｙ被覆が特に有効である場合とは、その被覆
がハフニウムを含有しない基質に対し着装される場合で
ある。下記の表１は本発明による被覆の組成範囲を示し
ている。The present invention provides that, under certain circumstances, Ni Co Cr AIY
It is based on the discovery that it is effective to increase the amount of yttrium in the coating over the deposits shown by the prior art. Ni Co C with high yttrium content
A case in which the r At Y coating is particularly effective is when the coating is applied to a hafnium-free substrate. Table 1 below shows the composition range of the coating according to the invention.

表　　１ 広範囲組成　　　好ましい組成 （重量％）　　　　（重量％） ニッケル　　　　　残部　　　　　　　残部コバルト　
　　　Ｏ〜３０　　　１５〜２５クロム　　　　１０〜
３５　　　１５〜２５アルミニウム　　８〜２０　　　
　１０〜２０イツトリウム　１．１〜３．０　　　　１
．１〜３．０これら、の組成によれば被覆の耐酸化性が
向上され、またこれら組成はイツトリウムの含有量が高
いことを除き米国特許第３．９２８，０２６号に記載さ
れたＮｉ　Ｃｏ　Ｃｒ　ＡＩ　Ｙ被覆組成と同様である
。本発明による被覆組成物はニッケル基超合金を保護す
るのに好適なものである。当技術分野に於ては、ある状
況の下ではＮｉ　Ｃｏ　Ｃｒ　Ａｔ　Ｙ被覆に他の元素
を添加することが有効であることが知られている。例え
ば米国特許第４．０３４゜１４２号には、ＭＣｒＡＩＹ
被覆にケイ素を添加することが提案されており、また米
国特許第３゜９１８．１３９号には、Ｎｉ　Ｇｏ　Ｃｒ
　ＡＩ　Ｙ被覆にプラチナ及びこれと同様の負金属を添
加することが提案されている。本発明は上述の如き米国
特許に記載された修正されたＮｉ　ＣＯＣｒ　ＡＩ　Ｙ
被覆に適用され得るものである。また本発明による被覆
に於てイツトリウムの含有量が高いことにより与えられ
る有益な効果に対し大きい悪影響を与えることなくその
特性を改善すべく、タンタル（０〜１０％）がイツトリ
ウム含有量の高いＮｉＣｏ　Ｃｒ　Ａｌ　’Ｖｌ！Ｉ！
覆に添加されてよいことが解っている。Table 1 Wide range composition Preferred composition (wt%) (wt%) Nickel Balance Balance Cobalt
O~30 15~25 Chromium 10~
35 15~25 Aluminum 8~20
10-20 Yttrium 1.1-3.0 1
．． 1 to 3.0 These compositions improve the oxidation resistance of the coating and are similar to the Ni Co Cr described in U.S. Pat. No. 3,928,026, except for the higher yttrium content. It is similar to the AI Y coating composition. Coating compositions according to the invention are suitable for protecting nickel-based superalloys. It is known in the art that under certain circumstances it is useful to add other elements to the Ni Co Cr At Y coating. For example, in U.S. Patent No. 4.034°142, MCrAIY
It has been proposed to add silicon to the coating, and U.S. Pat.
It has been proposed to add platinum and similar negative metals to AI Y coatings. The present invention is based on the modified Ni COCr AI Y described in the above-mentioned US patents.
It can be applied to coatings. Furthermore, in order to improve the properties of the coating according to the invention, without having a significant negative effect on the beneficial effects provided by the high yttrium content, tantalum (0-10%) is added to the high yttrium content of NiCo. Cr Al 'Vl! I!
It has been found that it may be added to the coating.

上述の被覆組成物は種々の着装法を使用して種々の基質
に着装されてよいものである。種々の点に対し考慮を払
うことにより基質及び被覆方法が選定され、それぞれ異
なった効果が生じる。最大のや果は本発明によるイツト
リウム含有量の高いＮｉ　Ｃｏ　Ｃｒ　ＡＩ　Ｙ被覆が
ハフニウムが故意に添加されてはいない基質に対し＠装
される場合に得られる。かかる基質は通常の鋳造多結晶
組織又は一方向凝固された柱状晶組織、又は一方向凝固
された単結晶組織を有している。柱状晶組織は好ましく
ない。何故ならば、柱状晶組織を有づ−る物品に於ける
結晶粒界を横切る方向の延性を充分な値とするためには
ハフニウムが必要であることが解っているからである。The coating compositions described above may be applied to a variety of substrates using a variety of application methods. Substrates and coating methods are selected with different considerations, each with different effects. The greatest yield is obtained when the yttrium-rich Ni Co Cr AI Y coating according to the invention is applied to a substrate to which hafnium has not been intentionally added. Such a matrix has a conventional cast polycrystalline structure or a directionally solidified columnar crystalline structure or a directionally solidified single crystalline structure. A columnar crystal structure is not preferred. This is because it has been found that hafnium is necessary to achieve sufficient ductility across grain boundaries in articles having a columnar crystal structure.

最もハフニウムを含有しない柱状晶組織を有する物品に
ついては、本発明による被覆によれば、高度の保護が与
えられる。本発明によるイツトリウム含有量の高いＩｃ
０ｃ「ＡＩＹ被覆によれば、被覆の着装方法に拘らず、
ハフニウムを含有しない基質が保護される。For articles with the least hafnium-free columnar crystal structure, the coating according to the invention provides a high degree of protection. Ic with high yttrium content according to the present invention
0c "According to AIY coating, regardless of the method of wearing the coating,
Substrates that do not contain hafnium are protected.

添付の図面は、Ｎｉ　Ｃｏ　Ｃｒ　ＡＩ　Ｙ被覆材料及
びケイ素を添加することにより修正されたＮｉＣ０Ｃｒ
　ＡＩ　Ｙ被覆材料の酸化寿命に対するイツトリウム含
有量の影響を示している。Ｎｉ　ＣＯＱｒＡＩＹ被覆材
料の公称組成は重量で２２％Ｃ０１１８％Ｃｒ、１２．
５％ＡＩ、梗々の量のＹ１残部Ｎｉであり、ケイ素を含
有するＮ１ＣｏＣｒＡＩＹ被覆の公称組成は重量で２２
％Ｃ０１１８％Ｏｒ、１２．５％ＡＩ　１１．５％Ｓｉ
、種々ノ鑞のＹ１残部Ｎｉであった。全ての試験は重量
で１０％Ｏｒ、５％Ｃ０，４％Ｗ、１．４％Ｔｉ１１２
％Ｔａ　、５％ＡＩ、残部はぼＮ：なる公称組成を有す
る単結晶基質について行なわれた。The attached drawings show the NiCoCr AI Y coating material and NiC0Cr modified by adding silicon.
Figure 3 shows the effect of yttrium content on the oxidation life of AI Y coating materials. The nominal composition of the Ni COQrAIY coating material is 22% CO, 18% Cr, 12.
The nominal composition of the silicon-containing N1CoCrAIY coating is 5% AI, a hefty amount of Y1 balance Ni, and 22
%C0118%Or, 12.5%AI 11.5%Si
, the Y1 balance of various solders was Ni. All tests were conducted using 10% Or, 5% C0, 4% W, 1.4% Ti112 by weight.
The experiments were carried out on a single crystal substrate with a nominal composition of %Ta, 5% AI, and the balance N.

被覆は電子ビーム蒸着法により着装された。試験は１１
４９℃の最高温度にて運転された繰返しバーナ装置内に
て行なわれた。尚液種寿命の測定結果は被覆の厚さの相
違を反映するよう補正された。The coating was applied by electron beam evaporation. The exam is 11
It was carried out in a cyclic burner apparatus operated at a maximum temperature of 49°C. The liquid life measurements were corrected to reflect differences in coating thickness.

添付の図面より、イツトリウムの含有量を増大させれば
被覆の寿命が大幅に増大することが解る。It can be seen from the accompanying figures that increasing the yttrium content significantly increases the lifetime of the coating.

例えばＮｉ　Ｃｏ　Ｃｒ　ＡＩ　Ｙ被覆については、イ
ツトリウムの含有量を１％より２％に増大することによ
り、被覆の寿命が約８２５時間より約１２９０時間にま
で５０％以上増大することが解る。For example, for the Ni Co Cr AI Y coating, it can be seen that increasing the yttrium content from 1% to 2% increases the lifetime of the coating by more than 50% from about 825 hours to about 1290 hours.

本発明による被覆が着装されてよい他の種類の基質はハ
フニウムを含有する基質である。本発明による被覆がハ
フニウムを含有する基質に着装されれば、基質と被覆と
の界面に融点の低い相が形成されるという問題が生じる
。かかる問題は本発明による被覆がプラズマスプレー法
により着装されれば最小限に抑えられる。プラズマスプ
レー法により着装された被覆は、被覆−基質界面の近傍
に於ける基質中のハフニウムを酸化するに充分な−の酸
素を不可避的に含有する。ハフニウムは一旦酸化される
と安定化し、有害な融点の低い相を形成することはない
。かくしてハフニウムを含有する基質に対しプラズマス
プレー法により本発明による被覆を着装すれば、融点の
低い相が発生づるという問題は生じない。Another type of substrate to which a coating according to the invention may be applied is a hafnium-containing substrate. If the coating according to the invention is applied to a hafnium-containing substrate, the problem arises that a low melting point phase is formed at the interface between the substrate and the coating. Such problems are minimized if the coating according to the invention is applied by plasma spraying. Coatings applied by plasma spraying necessarily contain sufficient oxygen to oxidize the hafnium in the substrate near the coating-substrate interface. Once hafnium is oxidized, it is stable and does not form harmful low-melting phases. Thus, when a hafnium-containing substrate is applied with a coating according to the invention by plasma spraying, the problem of low melting phases does not arise.

ＭＣｒ　Ａｔ　Ｙ＊−がハフニウムを含有する基質に対
し蒸着により着装される場合には、ハフニウムが基質内
より被覆内へ拡散し、その性能を改善する。しかしＭＣ
ｒＡＩＹ被覆がハフニウムを含有する基質に対しプラズ
マスプレー法により着装される場合には、被覆中に酸化
イツトリウム及び酸化アルミニウムとして存在する酸素
により、ハフニウムが被覆の性能を改善し得る程充分に
被覆の表面へ拡散することが阻止される。また拡散した
ハフニウムにより他の酸化物（酸化アルミニウム及び酸
化イツトリウム）が低減され、安定な酸化ハフニウムが
形成され、その結果被覆の改善はなされない。When MCr At Y*- is applied by vapor deposition to a hafnium-containing substrate, the hafnium diffuses from within the substrate into the coating, improving its performance. However, M.C.
When an rAIY coating is applied by plasma spraying to a hafnium-containing substrate, the oxygen present in the coating as yttrium oxide and aluminum oxide causes the hafnium to reach the surface of the coating sufficiently to improve the performance of the coating. This prevents it from spreading to. Also, the diffused hafnium reduces other oxides (aluminum oxide and yttrium oxide) and forms stable hafnium oxide, resulting in no improvement in the coating.

本発明によるイツトリウム含有量の高いＮｉＣｏ　Ｃｒ
　ＡＩ　Ｙ被覆を使用することにより、基質内のハフニ
ウムがプラズマスプレーされた被覆に対し与える効果の
減少を補償することが可能である。NiCoCr with high yttrium content according to the present invention
By using an AI Y coating, it is possible to compensate for the reduced effect that hafnium in the substrate has on plasma sprayed coatings.

即ち増大されたイツトリウムによって、被覆の保護アル
ミナスケールの密着性を向上させる際に於けるハフニウ
ムの減少が補償される。かくしてプラズマスプレーによ
り被覆がハフニウムを含有する基質に対し着装された場
合にも、被覆の耐久性が向上される。That is, the increased yttrium compensates for the loss of hafnium in improving the adhesion of the protective alumina scale of the coating. The durability of the coating is thus increased even when the coating is applied to a hafnium-containing substrate by plasma spraying.

以上に於ては本発明を特定の実施例について詳細に説明
したが、本発明はかかる実施例に限定されるものではな
′く、本発明の範囲内にて種々の、実施例が可能である
ことは当業者にとって明らかであろう。Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited to such embodiments, and various embodiments are possible within the scope of the present invention. This will be obvious to those skilled in the art.

【図面の簡単な説明】[Brief explanation of the drawing]

添付の図面は二つの異なる被覆についてイツトリウム含
有量の関数として被覆の寿命を示すグラフである。 特許出願人　　ユナイテッド・チクノロシーズ・コーポ
レイションThe accompanying drawing is a graph showing coating life as a function of yttrium content for two different coatings. Patent Applicant: United Chiknoroses Corporation

Claims (1)

【特許請求の範囲】[Claims] 超合金基質に対し優れた保護を与えることのできる被覆
組成物にして、実質的に１０〜３５％Ｃ「、８〜２０％
ＡＩ　、１．１〜３．０％Ｙ、０〜３０％ＣＯ１残部Ｎ
ｉよりなっていることを特徴とする被覆組成物。For coating compositions capable of providing excellent protection for superalloy substrates, substantially 10-35% C', 8-20%
AI, 1.1-3.0% Y, 0-30% CO1 balance N
A coating composition comprising: i.
JP57137165A 1981-08-05 1982-08-05 Coating composition Granted JPS5837146A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US28995381A 1981-08-05 1981-08-05
US289953 2002-11-06

Publications (2)

Publication Number Publication Date
JPS5837146A true JPS5837146A (en) 1983-03-04
JPH0372706B2 JPH0372706B2 (en) 1991-11-19

Family

ID=23113894

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57137165A Granted JPS5837146A (en) 1981-08-05 1982-08-05 Coating composition

Country Status (6)

Country Link
JP (1) JPS5837146A (en)
CA (1) CA1209827A (en)
DE (1) DE3229285A1 (en)
FR (1) FR2511043B1 (en)
GB (1) GB2103656B (en)
IL (1) IL66443A (en)

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US6818321B2 (en) 2001-11-02 2004-11-16 Tocalo Co., Ltd. High-temperature strength member
JP2007169786A (en) * 2005-12-19 2007-07-05 General Electric Co <Ge> Article with strain tolerant corrosion protecting coating
WO2010070982A1 (en) 2008-12-16 2010-06-24 旭硝子株式会社 Filmed metal member for float glass manufacturing equipment and float glass manufacturing method

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US4677035A (en) * 1984-12-06 1987-06-30 Avco Corp. High strength nickel base single crystal alloys
DE3612568A1 (en) * 1986-04-15 1987-10-29 Bbc Brown Boveri & Cie HIGH TEMPERATURE PROTECTIVE LAYER
DE58908611D1 (en) * 1989-08-10 1994-12-08 Siemens Ag HIGH-TEMPERATURE-RESISTANT CORROSION PROTECTION COATING, IN PARTICULAR FOR GAS TURBINE COMPONENTS.
US5582635A (en) * 1990-08-10 1996-12-10 Siemens Aktiengesellschaft High temperature-resistant corrosion protection coating for a component in particular a gas turbine component
US5401307A (en) * 1990-08-10 1995-03-28 Siemens Aktiengesellschaft High temperature-resistant corrosion protection coating on a component, in particular a gas turbine component
DE102005053531A1 (en) * 2005-11-08 2007-05-10 Man Turbo Ag Heat-insulating protective layer for a component within the hot gas region of a gas turbine
GB2443283A (en) * 2006-10-26 2008-04-30 Gen Electric Rub coating for gas turbine engine compressors
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JPS55161041A (en) * 1979-05-29 1980-12-15 Howmet Turbine Components Covering material

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US6818321B2 (en) 2001-11-02 2004-11-16 Tocalo Co., Ltd. High-temperature strength member
JP2007169786A (en) * 2005-12-19 2007-07-05 General Electric Co <Ge> Article with strain tolerant corrosion protecting coating
WO2010070982A1 (en) 2008-12-16 2010-06-24 旭硝子株式会社 Filmed metal member for float glass manufacturing equipment and float glass manufacturing method
KR20110111378A (en) 2008-12-16 2011-10-11 아사히 가라스 가부시키가이샤 Filmed metal member for float glass manufacturing equipment and float glass manufacturing method

Also Published As

Publication number Publication date
FR2511043A1 (en) 1983-02-11
DE3229285A1 (en) 1983-03-24
IL66443A (en) 1985-11-29
JPH0372706B2 (en) 1991-11-19
GB2103656B (en) 1985-06-26
FR2511043B1 (en) 1987-05-22
CA1209827A (en) 1986-08-19
DE3229285C2 (en) 1988-11-24
IL66443A0 (en) 1982-12-31
GB2103656A (en) 1983-02-23

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