JPH03221444A - Oxidation-resistant carbon material - Google Patents
Oxidation-resistant carbon materialInfo
- Publication number
- JPH03221444A JPH03221444A JP1743990A JP1743990A JPH03221444A JP H03221444 A JPH03221444 A JP H03221444A JP 1743990 A JP1743990 A JP 1743990A JP 1743990 A JP1743990 A JP 1743990A JP H03221444 A JPH03221444 A JP H03221444A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- carbon
- intermediate layer
- metal carbide
- metal oxide
- 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
Links
- 230000003647 oxidation Effects 0.000 title claims description 19
- 238000007254 oxidation reaction Methods 0.000 title claims description 19
- 239000003575 carbonaceous material Substances 0.000 title claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims description 43
- 239000002184 metal Substances 0.000 claims description 43
- 229910044991 metal oxide Inorganic materials 0.000 claims description 34
- 150000004706 metal oxides Chemical class 0.000 claims description 34
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 abstract description 8
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 229910052566 spinel group Inorganic materials 0.000 abstract 2
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 238000010304 firing Methods 0.000 description 7
- 239000011253 protective coating Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005336 cracking Methods 0.000 description 5
- 229910052596 spinel Inorganic materials 0.000 description 5
- 239000011029 spinel Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 229910052735 hafnium Inorganic materials 0.000 description 3
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910052776 Thorium Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000000872 buffer Substances 0.000 description 2
- 150000001721 carbon Chemical class 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000012705 liquid precursor Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- -1 alumina Chemical class 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000005049 silicon tetrachloride Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、例えばガスタービン部材、高温原子炉部材
、ジェットエンジン部材、ロケット部材、高温化学プラ
ント部材などとして使用され、高温雰囲気下で優れた耐
酸化性を有する耐酸化性炭素系材料に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention is used as, for example, gas turbine parts, high-temperature nuclear reactor parts, jet engine parts, rocket parts, high-temperature chemical plant parts, etc., and has excellent performance under high-temperature atmospheres. The present invention relates to an oxidation-resistant carbon-based material having oxidation resistance.
炭素繊維強化炭素などの炭素系材料は、優れた耐熱性を
有するものの高温酸化性雰囲気下ではその表面が酸化さ
れて徐々に劣化してゆく。Although carbon-based materials such as carbon fiber-reinforced carbon have excellent heat resistance, their surfaces are oxidized and gradually deteriorate in high-temperature oxidizing atmospheres.
このため、高温における耐酸化性を向上させる手段とし
て、炭素系材料の表面に直接アルミナ、ジルコニア、チ
タニャなどの金属酸化物からなる保護被膜をＣＶＤ広な
どによって設けることが行われている。Therefore, as a means to improve oxidation resistance at high temperatures, a protective coating made of a metal oxide such as alumina, zirconia, titania, etc. is directly provided on the surface of a carbon-based material by CVD or the like.
しかしながら、このような金属酸化物からなる保護被膜
を設けた炭素系材料では、母材の炭素系材料と保護被膜
の金属酸化物との熱膨張率の差に基づいて、高温下での
使用に際し、保護被膜に亀裂が入ったり、保護被膜が剥
離したりすることがある。このような不都合を避けるに
は、保護被膜の厚さを数μｍ程度と極めて薄くせざるを
得ない。However, carbon-based materials with protective coatings made of metal oxides cannot be used at high temperatures due to the difference in thermal expansion coefficient between the carbon-based material of the base material and the metal oxide of the protective coating. , the protective coating may crack or peel off. In order to avoid such inconveniences, the thickness of the protective coating must be extremely thin, on the order of several μm.
しかし、これでは膜厚が不足し、母材を酸化から長時間
にわたって確実に保護することができない問題かある。However, this has the problem that the film thickness is insufficient and the base material cannot be reliably protected from oxidation for a long period of time.
また、金属酸化物の種類によっては、保護被膜の金属酸
化物と母材の炭素系材料が高温雰囲気で直接化学反応を
起こし、保護被膜か変質し、保護機能を失うこともある
。Furthermore, depending on the type of metal oxide, the metal oxide of the protective coating and the carbon-based material of the base material may undergo a direct chemical reaction in a high-temperature atmosphere, causing the protective coating to change in quality and lose its protective function.
よって、この発明の課題は、高温雰囲気下においても亀
裂や剥離などの機械的損傷が生ずることかなく、かつ母
材との化学反応などの化学的損傷か生ずることのない耐
酸化性被膜を有する耐酸化性炭素系材料を提供すること
にある。Therefore, it is an object of this invention to have an oxidation-resistant coating that does not cause mechanical damage such as cracking or peeling even in a high-temperature atmosphere, and does not cause chemical damage such as chemical reaction with the base material. An object of the present invention is to provide an oxidation-resistant carbon-based material.
かかる課題は、炭素系母材表面に第１の中間層を介して
金属炭化物層を設け、この金属炭化物層上に第２の中間
層を介して金属酸化物層を設け、第１の中間層を炭素と
金属炭化物とから、第２の中間層を金属炭化物と金属酸
化物とから構成した多層構造の被膜を設けることによっ
て解決される。This problem can be solved by providing a metal carbide layer on the surface of the carbon-based base material via a first intermediate layer, providing a metal oxide layer on the metal carbide layer via a second intermediate layer, and forming the first intermediate layer. This problem can be solved by providing a multilayered coating in which the second intermediate layer is made of carbon and a metal carbide, and the second intermediate layer is made of a metal carbide and a metal oxide.
最外層か高温酸化性雰囲気下で最も安定な金属酸化物か
らなっているため、優れた耐酸化性を発揮する。また、
金属酸化物層と母材との中間には、金属酸化物および炭
素のいずれにも反応しない金属炭化物からなる層がある
ため、母材の炭素と金属酸化物との反応が防止される。It exhibits excellent oxidation resistance because the outermost layer is made of metal oxide, which is the most stable under high-temperature oxidizing atmospheres. Also,
Between the metal oxide layer and the base material, there is a layer made of a metal carbide that does not react with either the metal oxide or carbon, thereby preventing the reaction between the carbon of the base material and the metal oxide.
さらに、第１および第２の中間層によって熱膨張係数等
の差が緩衝され、金属酸化物層および金属炭化物層の割
れや剥離が防止される。Furthermore, the first and second intermediate layers buffer differences in thermal expansion coefficients, etc., and prevent cracking and peeling of the metal oxide layer and metal carbide layer.
以下、この発明の詳細な説明する。The present invention will be explained in detail below.
第１図は、この発明の耐酸化性炭素系材料の一例を示す
もので、図中符号１は炭素系母材である。FIG. 1 shows an example of the oxidation-resistant carbon-based material of the present invention, and reference numeral 1 in the figure indicates a carbon-based base material.
この炭素系母材１には、例えば、炭素、黒鉛あるいはこ
れらを炭素繊維で強化した炭素繊維強化炭素などが用い
られる。As the carbon-based base material 1, for example, carbon, graphite, or carbon fiber-reinforced carbon obtained by reinforcing these with carbon fibers is used.
この炭素系母材１の表面上には第１の中間層２が設けら
れている。この第１の中間層２は、この第１の中間層２
の上に設けられる金属炭化物層３を構成する金属炭化物
と母材１の炭素とからなる層であって、好ましくは、こ
の二つの成分の組成がその厚さ方向に連続的あるいは段
階的に変化し、母材ｌ側に這い部分ては炭素か多く、金
属炭化物層３に近い部分では金属炭化物か多いような傾
斜組成層であることか望ましい。この第１の中間層２は
、よって１層または２層以上の多層構造となることかあ
り、その全厚さは、約２５〜７５μｍ程度とされるが、
これに限られることはない。この第１の中間層２の形成
には通常のＣＶＤ法などか用いられ、組成の変化は、２
以上の気体原料の組成比あるいは気体原料の組み合わせ
およびその組成比を時間的に変化させることにまり遠戚
できる。また、炭素と金属炭化物との混合物を塗布し、
焼成する方法でもよく、この混合物の組成比を順次変化
させて多層構造の第１の中間層２を作ることかできる。A first intermediate layer 2 is provided on the surface of this carbon-based base material 1 . This first intermediate layer 2 is
A layer consisting of metal carbide constituting the metal carbide layer 3 provided thereon and carbon of the base material 1, preferably in which the composition of these two components changes continuously or stepwise in the thickness direction. However, it is desirable that the composition be a graded composition layer in which the portion extending toward the base material l side is rich in carbon, and the portion close to the metal carbide layer 3 is rich in metal carbide. This first intermediate layer 2 may therefore have a multilayer structure of one layer or two or more layers, and its total thickness is approximately 25 to 75 μm.
It is not limited to this. A normal CVD method or the like is used to form this first intermediate layer 2, and the composition change is 2
It can be closely related to changing the composition ratio of the gaseous raw materials or the combination of gaseous raw materials and the composition ratio thereof over time. Also, applying a mixture of carbon and metal carbide,
A firing method may be used, and the first intermediate layer 2 having a multilayer structure can be formed by sequentially changing the composition ratio of this mixture.
さ与に、焼成後に炭素および金属炭化物となる液状の前
駆体の混合物を塗布し、焼成する方法でもよく、同様に
その混合比を順次変化させて多層構造の傾斜組成層とす
ることかできる。Alternatively, a method may be used in which a mixture of liquid precursors that become carbon and metal carbides after firing is applied and fired, and similarly, the mixture ratio can be sequentially changed to form a multilayer structure with a gradient composition layer.
また、この第１の中間層３は、多孔質であってもよく、
勿論緻密な無孔質であってもよい。Further, this first intermediate layer 3 may be porous,
Of course, it may be dense and non-porous.
このような第１の中間層２上には、上述のように、金属
炭化物層３が設けられている。この金属炭化物層３は、
ケイ素、チタン、ジルコニウム、ハフニウム、クロム、
トリウムなどの金属の炭化物の１種または２種以上の混
合物からなるものである。この金属炭化物層３の厚さは
１０〜５０μｍ程度が好ましいが、この範囲に限られる
ものではない。金属炭化物層３の形成には、ＣＶＤ法、
スバ、タ法などの他に金属炭化物粉末スラリーを塗布し
、不活性雰囲気で焼成する方法や金属炭化物の液状前駆
体を塗布し、焼成する方法などが用いられる。金属炭化
物層３は多孔質であってもよく、また２層以上の多層構
造でもよい。As described above, the metal carbide layer 3 is provided on the first intermediate layer 2. This metal carbide layer 3 is
silicon, titanium, zirconium, hafnium, chromium,
It consists of one kind or a mixture of two or more kinds of metal carbides such as thorium. The thickness of this metal carbide layer 3 is preferably about 10 to 50 μm, but is not limited to this range. For forming the metal carbide layer 3, CVD method,
In addition to the Suba and Ta methods, a method of applying a metal carbide powder slurry and firing in an inert atmosphere, a method of applying a liquid precursor of a metal carbide, and firing, etc. are used. The metal carbide layer 3 may be porous or may have a multilayer structure of two or more layers.
さらに、この金属炭化物層３上には第２の中間層４が設
けられている。この第２の中間層４は、この層４の上に
設けられる金属酸化物層５を構成する金属酸化物と金属
炭化物層３を構成する金属炭化物とからなる層であって
、好ましくは第１の中間層２と同様に、この二成分の組
成がその厚さ方向に連続的あるいは段階的に変化し、金
属炭化物層３に近い部分では金属炭化物が多く、金属酸
化物層５に近い部分では金属酸化物が多いような傾斜組
成層であることが望ましい。この第２の中間層４の厚さ
は、約２５〜７５μｍ程度が好ましい。また、第２の中
間層４の形成方法は、第１の中間層２の形成に用いられ
た方法がそのまま適用できる。Furthermore, a second intermediate layer 4 is provided on this metal carbide layer 3. This second intermediate layer 4 is a layer made of a metal oxide forming the metal oxide layer 5 provided on this layer 4 and a metal carbide forming the metal carbide layer 3, and preferably Similar to the intermediate layer 2, the composition of these two components changes continuously or stepwise in the thickness direction, with the portion close to the metal carbide layer 3 having a large amount of metal carbide, and the portion close to the metal oxide layer 5 having a large amount of metal carbide. It is desirable that the layer be a graded composition layer containing a large amount of metal oxide. The thickness of this second intermediate layer 4 is preferably about 25 to 75 μm. Further, as the method for forming the second intermediate layer 4, the method used for forming the first intermediate layer 2 can be applied as is.
さらに、この第２の中間層２上に最外層となる金属酸化
物層５が設けられている。この金属酸化物層５は、アル
ミニウム、ケイ素、マグネシウム、チタン、／ハフニウ
ム、ハフニウム、クロム、トリウムなどの金属の酸化物
の１種または２種以上の混合物からなるものである。金
属酸化物層５の厚さは、要求される耐酸化性の度合によ
っても異なるか、通常は１０〜１００μｍ程度とされる
。Furthermore, a metal oxide layer 5 serving as the outermost layer is provided on the second intermediate layer 2. The metal oxide layer 5 is made of one or a mixture of two or more metal oxides such as aluminum, silicon, magnesium, titanium, hafnium, hafnium, chromium, and thorium. The thickness of the metal oxide layer 5 varies depending on the degree of oxidation resistance required, and is usually about 10 to 100 μm.
金属酸化物層５の形成は、金属炭化物層３の形成方法と
同様の方法か用いられる。The metal oxide layer 5 is formed using the same method as the metal carbide layer 3.
このような構成の耐酸化性炭素系材料にあっては、最外
層の金属酸化物層５によって、高い耐酸化性か得られる
。また金属酸化物層５と母材１との中間には金属炭化物
層３が存在することにより、高温での母材１の炭素と金
属酸化物層５の金属酸化物との反応が防止される。さら
に、第１および第２の中間層２，４か存在することによ
り、熱膨張係数等の差が緩衝され、割れ、剥離か生ずる
ことがなく、かつ母材ｌと金属炭化物層３とのおよび金
属炭化物層３と金属酸化物層５との接合強度も高いもの
となる。In the oxidation-resistant carbon-based material having such a configuration, high oxidation resistance can be obtained by the outermost metal oxide layer 5. Furthermore, the presence of the metal carbide layer 3 between the metal oxide layer 5 and the base material 1 prevents the reaction between the carbon of the base material 1 and the metal oxide of the metal oxide layer 5 at high temperatures. . Furthermore, the presence of the first and second intermediate layers 2 and 4 buffers the difference in coefficients of thermal expansion, etc., prevents cracking and peeling, and also prevents the difference between the base material l and the metal carbide layer 3. The bonding strength between the metal carbide layer 3 and the metal oxide layer 5 is also high.
炭素系母材ｌとして、径７μｍの炭素繊維からなる二次
元織物を複数枚積層しこの積層物の空隙（約４５体積％
）に炭素を充填した炭素繊維強化炭素を用いた。この炭
素系母材１の表面に、炭素と炭化ケイ素からなる第１の
中間層２を形成した。As the carbon-based matrix l, a plurality of two-dimensional fabrics made of carbon fibers with a diameter of 7 μm are laminated, and the voids (approximately 45% by volume) of this laminate are
) using carbon fiber-reinforced carbon filled with carbon. A first intermediate layer 2 made of carbon and silicon carbide was formed on the surface of this carbon-based base material 1.
これの形成にはＣＶＤ法を用い、気体原料として初めは
メタン、水素比（体積比）か１０：９０のものを用い、
その組成を経時的に、連続的に変化させ最後にはメタン
四塩化ケイ素 水素比が５１５：８０のものを用いる
ことによって膜組成が連続的に変化するようにした。処
理温度は１４００°Ｃてあり、膜厚は５０μｍ、気孔率
Ｏ％であった。The CVD method is used to form this, and initially methane and hydrogen ratio (volume ratio) of 10:90 is used as the gaseous raw material.
The composition was changed continuously over time, and finally, by using a film having a methane:silicon tetrachloride:hydrogen ratio of 515:80, the film composition was made to change continuously. The treatment temperature was 1400°C, the film thickness was 50 μm, and the porosity was 0%.
この第１の中間層２上に炭化ケイ素からなる厚さ２０μ
ｍの金属炭化物層３を設けた。この金属炭化物層３の形
成は、第１の中間層２の形成後、そのままの条件で延長
することで行われた。気孔率０％。A thickness of 20 μm made of silicon carbide is formed on this first intermediate layer 2.
A metal carbide layer 3 of m was provided. The metal carbide layer 3 was formed by extending the first intermediate layer 2 under the same conditions after the formation of the first intermediate layer 2. Porosity: 0%.
この金属炭化物層３上に、炭化ケイ素とスピネル（Ａ
（ｌｔｏ ３ ・Ｍ ｇ○）とからなる厚さ５０μｍの
第２の中間層４を設けた。この第２の中間層４は、三層
構造で、金属炭化物層３側から、順に炭化ケイ素とスピ
ネルの混合比が３：１，１：１１．３の組成となってい
る。この層の形成方法は炭化ケイ素とスピネルとの混合
粉を塗布し、アルゴン雰囲気中で焼成する方法によった
。よって、この層は約２０〜４０体積％の気孔率を有す
る多孔質層である。On this metal carbide layer 3, silicon carbide and spinel (A
A second intermediate layer 4 having a thickness of 50 μm and consisting of (lto 3 ·M g○) was provided. This second intermediate layer 4 has a three-layer structure, and has a composition in which the mixing ratio of silicon carbide and spinel is 3:1 and 1:11.3 in order from the metal carbide layer 3 side. This layer was formed by applying a mixed powder of silicon carbide and spinel and firing it in an argon atmosphere. This layer is thus a porous layer with a porosity of approximately 20-40% by volume.
最゛後に、この第２の中間層４上にスピネルからなる厚
さ３０μｍの金属酸化物層５を設けた。この層５は二層
構造となっており、下層はスピネル粉末を塗布し、アル
コン中で焼成することで形成し、上層はアルミニウムゾ
ルとマグネシウムゾルとの混合物を塗布し、焼成するこ
とで緻密な膜とした。Finally, a metal oxide layer 5 made of spinel and having a thickness of 30 μm was provided on the second intermediate layer 4. This layer 5 has a two-layer structure; the lower layer is formed by applying spinel powder and firing in Alcon, and the upper layer is formed by applying a mixture of aluminum sol and magnesium sol and firing to form a dense layer. It was made into a film.
このようにして得られた炭素系材料の被膜表面を、高速
火炎で表面温度１８００℃まで加熱する操作を２０サイ
クル繰り返したが、最外層の金属酸化物層５には剥離、
割れの発生が認められず、酸化も受けなかった。The coating surface of the carbon-based material obtained in this way was heated to a surface temperature of 1800°C using a high-velocity flame for 20 cycles, but the outermost metal oxide layer 5 did not peel off.
No cracking was observed and no oxidation occurred.
これに対して、同様の炭素系母材１上に直接金属酸化物
層５を同様の方法で設けようとしたが、亀裂か入った膜
しか形成てきなかった。また、同様の加熱テストを行っ
たところ、金属酸化物層５が完全に剥離し、母材表面が
著しい酸化を受けた。In contrast, an attempt was made to form a metal oxide layer 5 directly on a similar carbon-based base material 1 using a similar method, but only a film with cracks was formed. Further, when a similar heating test was conducted, the metal oxide layer 5 was completely peeled off and the surface of the base material was significantly oxidized.
以上説明したように、この発明の耐酸化性炭素系材料は
炭素系母材表面に第１の中間層を介して金属炭化物層が
設けられ、この金属炭化物層上に第２の中間層を介して
金属酸化物層か設けられてなり、第１の中間層が炭素と
金属炭化物とからなり、第２の中間層か金属炭化物と金
属酸化物とからなるものであるので、高温下においても
亀裂や剥離などか生じることがなく、かつ母材との化学
反応などが生じることのない耐酸化性被膜を有するもの
となり、高い耐熱性、耐酸化性、耐食性を兼ね備えた材
料となる。As explained above, in the oxidation-resistant carbon-based material of the present invention, a metal carbide layer is provided on the surface of the carbon-based base material with a first intermediate layer interposed therebetween, and a second intermediate layer is provided on the metal carbide layer. Since the first intermediate layer is made of carbon and metal carbide, and the second intermediate layer is made of metal carbide and metal oxide, there will be no cracking even at high temperatures. The material has an oxidation-resistant coating that does not cause peeling or peeling, and does not cause chemical reactions with the base material, resulting in a material that has high heat resistance, oxidation resistance, and corrosion resistance.
第１図は、この発明の耐酸化性炭素系材料の一例を示す
概略断面図である。
１・・・・・・炭素系母材、２・・・・第１の中間層、
３・・・・金属炭素物層、４ ・・・・第２の屯間層、
５・・・金属酸化物層。FIG. 1 is a schematic cross-sectional view showing an example of the oxidation-resistant carbon-based material of the present invention. 1... Carbon-based base material, 2... First intermediate layer,
3...Metal carbon layer, 4...Second Tonma layer,
5...Metal oxide layer.
Claims (2)
物層が設けられ、この金属炭化物層上に第２の中間層を
介して金属酸化物層が設けられてなり、第１の中間層が
炭素と金属炭化物とからなり、第２の中間層が金属炭化
物と金属酸化物とからなることを特徴とする耐酸化性炭
素系材料。(1) A metal carbide layer is provided on the surface of the carbon-based base material via a first intermediate layer, and a metal oxide layer is provided on the metal carbide layer via a second intermediate layer, and the first An oxidation-resistant carbon-based material characterized in that the intermediate layer is made of carbon and a metal carbide, and the second intermediate layer is made of a metal carbide and a metal oxide.
るいは段階的に変化する傾斜組成層であることを特徴と
する請求項（１）記載の耐酸化性炭素系材料。(2) The oxidation-resistant carbon-based material according to claim (1), wherein the first and second intermediate layers are gradient composition layers whose compositions change continuously or stepwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1743990A JP2827387B2 (en) | 1990-01-26 | 1990-01-26 | Oxidation resistant carbon-based materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1743990A JP2827387B2 (en) | 1990-01-26 | 1990-01-26 | Oxidation resistant carbon-based materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03221444A true JPH03221444A (en) | 1991-09-30 |
| JP2827387B2 JP2827387B2 (en) | 1998-11-25 |
Family
ID=11944059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1743990A Expired - Fee Related JP2827387B2 (en) | 1990-01-26 | 1990-01-26 | Oxidation resistant carbon-based materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2827387B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999023278A1 (en) * | 1997-11-03 | 1999-05-14 | Siemens Aktiengesellschaft | Product,especially a gas turbine component, withe a ceramic heat insulating layer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2884550B1 (en) * | 2005-04-15 | 2010-09-17 | Snecma Moteurs | PIECE FOR PROTECTING THE EDGE OF A BLADE |
-
1990
- 1990-01-26 JP JP1743990A patent/JP2827387B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999023278A1 (en) * | 1997-11-03 | 1999-05-14 | Siemens Aktiengesellschaft | Product,especially a gas turbine component, withe a ceramic heat insulating layer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2827387B2 (en) | 1998-11-25 |
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