JPH0114995B2 - - Google Patents
Info
- Publication number
- JPH0114995B2 JPH0114995B2 JP59031248A JP3124884A JPH0114995B2 JP H0114995 B2 JPH0114995 B2 JP H0114995B2 JP 59031248 A JP59031248 A JP 59031248A JP 3124884 A JP3124884 A JP 3124884A JP H0114995 B2 JPH0114995 B2 JP H0114995B2
- Authority
- JP
- Japan
- Prior art keywords
- whiskers
- thermal spray
- ceramic
- spray material
- silicon nitride
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 15
- 239000000919 ceramic Substances 0.000 claims description 12
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 10
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 10
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 9
- 239000011224 oxide ceramic Substances 0.000 claims description 8
- 229910052574 oxide ceramic Inorganic materials 0.000 claims description 8
- 239000010419 fine particle Substances 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 3
- 239000011882 ultra-fine particle Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000007751 thermal spraying Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
Description
【発明の詳細な説明】
本発明はセラミツクウイスカーを含有する酸化
物セラミツク溶射材料に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to oxide ceramic thermal spray materials containing ceramic whiskers.
従来より、溶射材料をガス炎あるいはプラズマ
炎中で溶融させ、目的の素材表面に吹きつけコー
テイングする方法は広く利用されている。 BACKGROUND ART Conventionally, a method has been widely used in which a thermal spray material is melted in a gas flame or plasma flame and sprayed onto the surface of a target material for coating.
最近では、複数の材料を複合させた溶射材料が
被膜の性質の改善あるいは機能性の付与を目的と
して開発されている。 Recently, thermal spray materials made of composites of multiple materials have been developed for the purpose of improving coating properties or imparting functionality.
たとえば、特願昭58−28237号においては、窒
化珪素あるいは炭化珪素ウイスカーを従来の溶射
材料と混合・造粒することにより製造されるセラ
ミツクウイスカー含有溶射材料が述べられてい
る。この溶射材料をガス炎やプラズマ炎など常套
溶射方法により溶射して得られる溶射被膜はその
密着性、耐熱サイクル性の向上が図られている
が、実際に溶射作業を行つた場合、再現性のある
溶射被膜が得られるのはウイスカー重量部が１〜
３％前後までであつて、ウイスカー含有量が３％
以上に増えるとガス炎あるいはプラズマ炎中にて
ウイスカーと粉末溶射材料の分離現象が顕著とな
り、被膜特性の再現性において著しく不安定とな
る欠点があつた。 For example, Japanese Patent Application No. 58-28237 describes a thermal spray material containing ceramic whiskers which is produced by mixing and granulating silicon nitride or silicon carbide whiskers with conventional thermal spray materials. The sprayed coating obtained by spraying this thermal spraying material using conventional thermal spraying methods such as gas flame or plasma flame is intended to improve its adhesion and heat cycle resistance, but when actually performing thermal spraying work, the reproducibility A certain thermal spray coating can be obtained when the whisker weight part is 1 to 1.
Up to around 3%, whisker content is 3%
When the amount is increased above this amount, the phenomenon of separation of the whiskers and the powder sprayed material becomes noticeable in the gas flame or plasma flame, resulting in a drawback that the reproducibility of the coating properties becomes extremely unstable.
本発明は上述の点に鑑み成されたものであつ
て、窒化珪素ウイスカーや炭化珪素ウイスカーな
どのセラミツク針状繊維材料を再現性をもつて溶
射することのできる複合溶射材料を提供しようと
いうものである。 The present invention has been made in view of the above points, and aims to provide a composite thermal spraying material that can reproducibly spray ceramic acicular fiber materials such as silicon nitride whiskers and silicon carbide whiskers. be.
以下、本発明の構成について説明する。 The configuration of the present invention will be explained below.
すなわち、本発明の構成要旨とするところは、
酸化物セラミツク微粒子〜超微粒子と、窒化珪
素もしくは炭化珪素のセラミツクウイスカーを混
合し、焼成することを特徴とするセラミツクウイ
スカーを含有する複合溶射材料、にある。 That is, the gist of the present invention is to provide a composite thermal spray material containing ceramic whiskers, which is characterized in that fine to ultrafine oxide ceramic particles and ceramic whiskers of silicon nitride or silicon carbide are mixed and fired. be.
つぎに、本発明を具体的に説明する。 Next, the present invention will be specifically explained.
粒径数μｍ以下（好ましくは、0.5μｍ以下）の
酸化物セラミツク微粒子〜超微粒子に、直径0.1μ
ｍ以上〜1μｍ以下、長さ10〜50μｍ（好ましくは
10〜20μｍ）の窒化珪素あるいは炭化珪素ウイス
カーを、複合すべき酸化物セラミツク微粒子の種
類にもよるが、10〜40重量部（好ましくは20重量
部以下）混合し、それをさらに、ウイスカーと酸
化物セラミツク微粒子の間に実質的な反応がおこ
らないような温度、雰囲気、時間の条件下で焼成
し、それをさらに150メツシユ以下（好ましくは
200メツシユ以下）に粉砕し、5μｍ（好ましくは
10μｍ以下）の微粒子を分級することにより除去
する工程より成つている。 Oxide ceramic fine particles to ultrafine particles with a particle size of several μm or less (preferably 0.5 μm or less) have a diameter of 0.1 μm.
m or more to 1 μm or less, length 10 to 50 μm (preferably
Depending on the type of oxide ceramic fine particles to be composited, 10 to 40 parts by weight (preferably 20 parts by weight or less) of silicon nitride or silicon carbide whiskers (10 to 20 μm) are mixed, and this is further mixed with the whiskers and oxidized. It is fired under conditions of temperature, atmosphere, and time such that no substantial reaction occurs between the ceramic fine particles, and then further heated to 150 meshes or less (preferably
200 mesh or less) and 5 μm (preferably
It consists of a process of removing fine particles (10 μm or less) by classifying them.
また、上記酸化物セラミツク微粒子と窒化珪素
もしくは炭化珪素ウイスカーを混合したものを焼
成する前にあらかじめ、適度の粒度に造粒しても
差支えなく、この場合には焼成後の粉砕ならびに
気流分級などの手段は省略できる。 In addition, it is also possible to granulate the mixture of the above oxide ceramic fine particles and silicon nitride or silicon carbide whiskers to an appropriate particle size before firing, and in this case, pulverization after firing, air classification, etc. The means can be omitted.
ここで、本発明において使用する窒化珪素ウイ
スカーもしくは炭化珪素ウイスカーとしては、た
とえば、特願昭56−118878号、特願昭57−55196
号、特願昭57−96791号及び特願昭57−233349号
により得られるものを長さを粉砕などにより適
宜、調整して使用するのが望ましい。 Here, the silicon nitride whiskers or silicon carbide whiskers used in the present invention include, for example, Japanese Patent Application No. 56-118878, Japanese Patent Application No. 57-55196
It is desirable to use those obtained by Japanese Patent Application No. 57-96791 and Japanese Patent Application No. 57-233349 after adjusting the length as appropriate by crushing or the like.
以下本発明の実施例について述べる。 Examples of the present invention will be described below.
実施例 １
NiO微粉（5μｍ以下）に直径0.2〜1μｍ、長さ
10〜50μｍの窒化珪素ウイスカーを10重量部加
え、均一に混合したのち、空気中1400℃で20分間
焼成した。これを200メツシユ以下に粉砕後、気
流分級して10μｍ以下の微粒子を除去した。Example 1 NiO fine powder (5 μm or less) with a diameter of 0.2 to 1 μm and a length
10 parts by weight of silicon nitride whiskers with a diameter of 10 to 50 μm were added, mixed uniformly, and then fired in air at 1400° C. for 20 minutes. After pulverizing this into 200 meshes or less, it was air classified to remove fine particles of 10 μm or less.
このようにして調製した溶射材料をサンドブラ
ストしたSS−41鉄板の上にプラズマ溶射した。
この溶射材料を使用することにより従来、見られ
ていた多量の未溶着のウイスカー、粉体などの存
在は皆無となつた。 The spray material thus prepared was plasma sprayed onto a sandblasted SS-41 iron plate.
By using this thermal spray material, the presence of large amounts of unwelded whiskers, powder, etc. that were conventionally observed has completely disappeared.
被膜断面の顕微鏡観察ではウイスカーは被膜内
に均一に分散していることが確認できた。 Microscopic observation of a cross section of the film confirmed that the whiskers were uniformly dispersed within the film.
実施例 ２
ZrO2・8mol％CaOの組成になるよう調整され
たZrOCl2−CaCl2水溶液に直径0.1〜1.0μｍ、長さ
20〜50μｍのSi3N4ウイスカーを分散させ、それ
をNH4OH20％水溶液で共沈させ、ZrO2・8mol
％CaO／10wt％SNWの混合物を調製した。Example 2 A diameter of 0.1 to 1.0 μm and a length of ZrOCl 2 -CaCl 2 aqueous solution adjusted to have a composition of ZrO 2 8 mol% CaO
Disperse 20-50 μm Si 3 N 4 whiskers, coprecipitate them with 20% NH 4 OH aqueous solution, and add 2.8 mol of ZrO.
A mixture of %CaO/10wt% SNW was prepared.
これを800℃にて３時間加熱したのち、200メツ
シユに粉砕、気流分級により10μｍ以下の粒子を
除去した。 After heating this at 800° C. for 3 hours, it was crushed into 200 meshes, and particles of 10 μm or less were removed by air classification.
このようにして調製した溶射材料をサンドブラ
ストしたSS−41鉄板上にプラズマ溶射した。得
られた溶射被膜はかなり多孔質であつたが、未溶
着のウイスカーとか粉末物は皆無であつた。この
試料について900℃→水中への熱衝撃試験をおこ
なつたところ、20回以上のサイクルを耐えた。ま
た、これは該ウイスカーを含有しない場合（４〜
５回）の約５倍近くにあたり、該ウイスカーの均
一分散による混在効果が確認できた。 The spray material thus prepared was plasma sprayed onto a sandblasted SS-41 iron plate. The sprayed coating obtained was quite porous, but there were no unwelded whiskers or powdery substances. When this sample was subjected to a thermal shock test from 900℃ to water, it withstood more than 20 cycles. In addition, this is the case when the whisker is not contained (4 to 4).
5 times), and a mixing effect due to uniform dispersion of the whiskers was confirmed.
Claims (1)
珪素もしくは炭化珪素のセラミツクウイスカーを
混合し、焼成することを特徴とするセラミツクウ
イスカーを含有する複合溶射材料。 ２ 特許請求の範囲第１項に記載の溶射材料にお
いて、酸化物セラミツク微粒子〜超微粒子と、窒
化珪素もしくは炭化珪素のセラミツクウイスカー
を混合したものを焼成する前にあらかじめ、造粒
しておくことを特徴とするセラミツクウイスカー
を含有する複合溶射材料。 ３ 特許請求の範囲第１項に記載の溶射材料にお
いて、酸化物セラミツク微粒子〜超微粒子と、窒
化珪素もしくは炭化珪素のセラミツクウイスカー
を混合し、焼成したものを粉砕し、気流分級する
ことを特徴とするセラミツクウイスカーを含有す
る複合溶射材料。[Scope of Claims] 1. A composite thermal spray material containing ceramic whiskers, characterized in that fine to ultrafine oxide ceramic particles and ceramic whiskers of silicon nitride or silicon carbide are mixed and fired. 2. In the thermal spray material according to claim 1, a mixture of oxide ceramic fine particles to ultrafine particles and ceramic whiskers of silicon nitride or silicon carbide may be granulated in advance before firing. A composite thermal spray material containing characteristic ceramic whiskers. 3. The thermal spray material according to claim 1, characterized in that fine to ultrafine particles of oxide ceramic and ceramic whiskers of silicon nitride or silicon carbide are mixed, the fired product is pulverized, and then air-flow classified. A composite thermal spray material containing ceramic whiskers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59031248A JPS60174862A (en) | 1984-02-20 | 1984-02-20 | Composite spraying material containing ceramic whisker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59031248A JPS60174862A (en) | 1984-02-20 | 1984-02-20 | Composite spraying material containing ceramic whisker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60174862A JPS60174862A (en) | 1985-09-09 |
| JPH0114995B2 true JPH0114995B2 (en) | 1989-03-15 |
Family
ID=12326066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59031248A Granted JPS60174862A (en) | 1984-02-20 | 1984-02-20 | Composite spraying material containing ceramic whisker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60174862A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7799111B2 (en) * | 2005-03-28 | 2010-09-21 | Sulzer Metco Venture Llc | Thermal spray feedstock composition |
| DE102011052121A1 (en) * | 2011-07-25 | 2013-01-31 | Eckart Gmbh | Coating process using special powder coating materials and use of such coating materials |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59153877A (en) * | 1983-02-22 | 1984-09-01 | Tateho Kagaku Kogyo Kk | Spraying material containing needlelike ceramic fiber |
-
1984
- 1984-02-20 JP JP59031248A patent/JPS60174862A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59153877A (en) * | 1983-02-22 | 1984-09-01 | Tateho Kagaku Kogyo Kk | Spraying material containing needlelike ceramic fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60174862A (en) | 1985-09-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |