JPH0419541A - Ceramic melt-sprayed body and measuring method for its porosity - Google Patents
Ceramic melt-sprayed body and measuring method for its porosityInfo
- Publication number
- JPH0419541A JPH0419541A JP12346790A JP12346790A JPH0419541A JP H0419541 A JPH0419541 A JP H0419541A JP 12346790 A JP12346790 A JP 12346790A JP 12346790 A JP12346790 A JP 12346790A JP H0419541 A JPH0419541 A JP H0419541A
- Authority
- JP
- Japan
- Prior art keywords
- porosity
- ceramic
- film
- sprayed
- film body
- 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.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 9
- 239000002184 metal Substances 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000011148 porous material Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 26
- 230000035699 permeability Effects 0.000 abstract description 11
- 238000005507 spraying Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000007751 thermal spraying Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005524 ceramic coating Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 235000002597 Solanum melongena Nutrition 0.000 description 1
- 244000061458 Solanum melongena Species 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000012360 testing method Methods 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、セラミック粉末を溶射した微細な通孔を有
するセラミ、ツクの溶射膜体並びにその溶射膜体の気孔
率の測定方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a thermally sprayed ceramic film having fine holes formed by thermally spraying ceramic powder, and a method for measuring the porosity of the thermally sprayed film. be.
従来、微細な通孔を有するセラミックとしては、高温で
焼成した一体型のカー） ＩＪッジフィルターがよく知
られており、円筒状に構成した 炉材として用いられて
いる。Conventionally, as a ceramic having fine holes, an integrated Kerr IJ filter fired at a high temperature is well known, and is used as a furnace material having a cylindrical shape.
また、セラミックを金属面や合成樹脂面に溶射してその
表面にセラミックの皮膜を形成することもよく知られて
いる。すなわち、金属面の防錆や摩耗防止のために行な
われている。It is also well known to thermally spray ceramic onto a metal or synthetic resin surface to form a ceramic film on the surface. In other words, this is done to prevent rust and wear on metal surfaces.
然しなから、セラミックの溶射皮膜は多孔質であり、こ
の微細通孔を通じて母材が腐蝕等するので、皮膜を形成
する上でその気孔率を知っておく必要がある。この気孔
率を知る方法としては、溶着した皮膜であるだけに金属
面等に溶射したものでは、７エロシアン化鉄の青色斑点
で調べるフェロキシル法を用いており、また、皮膜単体
の気孔率を知りたい場合には、基材（母材）を薬品で溶
解して皮膜だけにしてその気孔率を測定している。However, thermal sprayed ceramic coatings are porous, and the base material is subject to corrosion through these fine pores, so it is necessary to know the porosity when forming the coating. As a method for determining this porosity, we use the ferroxyl method, which examines the blue spots of iron 7-erocyanide, in the case of welded coatings that are sprayed onto metal surfaces, etc.; When this is necessary, the base material (base material) is dissolved with a chemical to form only a film, and its porosity is measured.
然しなから、従来のセラミックの高温焼成体では、その
焼成炉がその大きさ、形状等によって制限を受け、また
、使用材料も多く必要とする上、焼成にも時間を要する
。また、気孔率を測定するにしても従来の方法では、別
に試験片を作成しなければならず、また、薬品を使用す
る危険性もある０
〔課題を解決するだめの手段〕
この発明は、次のような手段、手法を用いて上述のよう
な課題を解決したものである。However, in the case of conventional high-temperature fired ceramic bodies, the firing furnace is limited by the size, shape, etc., and moreover, a large amount of materials are required, and firing also takes time. Furthermore, in the conventional method for measuring porosity, it is necessary to separately prepare a test piece, and there is also the risk of using chemicals. The above-mentioned problems were solved using the following means and techniques.
（１） 直径１００μｍ以下の微細通孔を有するメタル
メツシュ上に、直径４０μｍ以下のセラミックを付着さ
せて溶射膜体を構成した。(1) A thermal sprayed film body was constructed by depositing ceramic with a diameter of 40 μm or less on a metal mesh having fine holes with a diameter of 100 μm or less.
（２） 予め気孔率の判明している微細通孔を有する
メタルメソシュ面にセラミックを溶射付着させ、この溶
射膜体を真空吸引源に接続した試験器に取付け、直接真
空吸引して、その気孔率を知る↓うにした。すなわち、
この気孔率の測定方法は、従来の方法が薬品等を用いて
手数を要するとともに、危険性も伴なうのに対して、こ
の発明では、溶射したセラミ・ンク皮膜そのものの気孔
率を直接測定できるもので、手数を要せず、危険性も全
くないものである。また、この発明に係るセラミック溶
射膜体は、膜体であるだけに材料を要せず、焼成するの
に比較して格段に短時間で且つ種々の形状のものを簡単
に製作することができる。(2) Ceramic is thermally sprayed onto a metal mesh surface with fine pores whose porosity is known in advance, and this thermally sprayed film is attached to a tester connected to a vacuum suction source, and the porosity is determined by direct vacuum suction. I learned ↓. That is,
This method of measuring porosity is complicated and dangerous because conventional methods use chemicals, etc., but in this invention, the porosity of the thermally sprayed ceramic ink film itself can be directly measured. It's something you can do, it doesn't require any effort, and there's no danger at all. Furthermore, since the ceramic sprayed film body according to the present invention is a film body, it does not require any materials, and can be easily produced in a variety of shapes in a much shorter time compared to firing. .
以下、この発明を具体的に説明する。This invention will be specifically explained below.
第１図は、溶射基材であるメタルメツシュの平面図、第
２図はその断面図であり、平織りに編成されており、符
号１は縦線、２は横線である。縦線１と横線２とで構成
される目３は、円形ではないが直径約４０μｍのものを
用いている。尚、基材とするメタルメソシュは、綾織り
にしたもの、薄板をパンチングしたもの、また、これら
を層状に重ねたもの等、種々のものを用いることができ
る。第３図は、溶射の概念を示すもので、溶射皮膜は加
工が困難のために、基材４を所望の形状に予め加工した
ものに溶射する。図示のものは、円筒状に加工したメタ
ルメツシュの基材４に溶射する状態を示しているが、均
一な溶射皮膜を形成するために基材４回転台５で支持し
ている。Ｇはセラミックの噴射ガンである。このように
、支持具等（治具）を工夫することによって、平板状の
もの、その他複雑な形状のものにも均一な溶射皮膜を形
成することが可能である。FIG. 1 is a plan view of a metal mesh, which is a thermal spray base material, and FIG. 2 is a cross-sectional view thereof, which is knitted in a plain weave, with reference numerals 1 and 2 representing vertical lines and horizontal lines, respectively. The eye 3 composed of the vertical line 1 and the horizontal line 2 is not circular, but has a diameter of about 40 μm. Note that various metal meshes can be used as the base material, such as a twill weave, a punched thin plate, or a layered metal mesh. FIG. 3 shows the concept of thermal spraying. Since thermal spray coatings are difficult to process, thermal spraying is performed on a base material 4 that has been previously processed into a desired shape. The illustrated example shows a state in which a metal mesh base material 4 processed into a cylindrical shape is thermally sprayed, and the base material is supported on a four-turn table 5 in order to form a uniform thermally sprayed coating. G is a ceramic injection gun. In this way, by devising the support tool etc. (jig), it is possible to form a uniform thermal spray coating even on flat objects and other complicated shapes.
上述のようにして、メタルメツシュ面に形成される皮膜
６は微細な通孔を有する基材４の上に溶融した微細な粒
子のセラミックが吹きつけられ、この吹きつけの際、粒
子が溶融しているので、基材４に衝突することによって
偏平に変形し、基材４の百３から抜けることなく、固化
する。従って、基材４の微細な通孔よりもさらに微細な
通孔を有する 皮膜６が形成される。As described above, the coating 6 formed on the metal mesh surface is formed by spraying molten fine particles of ceramic onto the base material 4 having minute holes, and during this spraying, the particles are melted. Therefore, it deforms into a flat shape by colliding with the base material 4, and solidifies without coming off from the base material 4. Therefore, a film 6 having even finer pores than the fine pores of the base material 4 is formed.
この基材面に形成されるセラミックの皮膜６は、その通
孔がセラミックの種類、その粉末粒の大きさ、また、基
材４の目３の大きさ等で調節できる。The through holes of the ceramic film 6 formed on the surface of the base material can be adjusted by the type of ceramic, the size of the powder particles, the size of the openings 3 of the base material 4, and the like.
このセラミックをフーティングした基材４は、特に精密
濾過に用いるＰ材として、従来の焼成したセラミックカ
ートリッジに比較して製作に手数を要せず、薄いだけに
小量の材料で済む上、目詰りした場合に再生が容易であ
る等数々の利点を有する０
また、この発明に係るセラミック溶射皮膜は、Ｐ材とし
て利用できるばかりでなく、メタルメツシュを含めた溶
射膜体の通気度を直接測定することができるので、セラ
ミックを溶射して金属等の表面処理をするに当ってその
溶射材料によるピンホール等の発生度を簡単に確認する
ことができる。This ceramic-footed base material 4 is particularly useful as a P material used in precision filtration, as it requires less time and effort to manufacture compared to conventional fired ceramic cartridges, and is thinner, requiring only a small amount of material. In addition, the ceramic sprayed coating according to the present invention can not only be used as a P material, but also be used to directly measure the air permeability of sprayed coatings including metal meshes. Therefore, when thermally spraying ceramic to treat the surface of metal, etc., it is possible to easily check the degree of occurrence of pinholes etc. due to the thermally sprayed material.
すなわち、通気度の判明しているメタルメツシュにある
条件を定めてセラミックを溶射して皮膜を形成し、この
皮膜を形成した膜体の通気度を測定すればよいもので、
すなわち、その通気度が基材であるメタルメツシュの通
気度よりも低い場合は、それが皮膜の通気度である。従
来、金属面のセラミックを溶射して表面処理を行なう場
合、セラミック皮膜のピンホールが錆や腐蝕の原因とな
り問題となったのであるが、この発明によれば、形成さ
れる皮膜の通気度、すなわち、ピンホールの発生状況が
即確詔できるので、その確認結果に基づいて使用材料、
膜厚等を調整すればよく、従来のナス１ピースを用いた
り、薬品を用いたりする方法に比較すれば、その手数を
著しく軽減し得るものである。In other words, it is sufficient to thermally spray ceramic on a metal mesh whose air permeability is known under certain conditions to form a film, and then measure the air permeability of the membrane body on which this film has been formed.
That is, if the air permeability is lower than the air permeability of the metal mesh that is the base material, this is the air permeability of the film. Conventionally, when performing surface treatment by thermal spraying ceramic on metal surfaces, pinholes in the ceramic film caused rust and corrosion, which caused problems, but according to the present invention, the air permeability of the formed film, In other words, the occurrence of pinholes can be confirmed immediately, and based on the confirmation results, the materials to be used,
It is only necessary to adjust the film thickness, etc., and compared to the conventional method of using one piece of eggplant or using chemicals, the number of steps involved can be significantly reduced.
第４図は、セラミックを溶射したメタルメツシュの通気
度の測定装置の概要を示すもので、図中Ａはテスター
Ｂはセットされた溶射膜体、Ｃ１・Ｇはバルブ、Ｄはメ
スシリンダー Ｅは真空ゲージ、ｑは真空ポンプである
。Figure 4 shows an overview of the air permeability measurement device for metal mesh sprayed with ceramic, and A in the figure is a tester.
B is the set thermal spray coating body, C1 and G are the valves, D is the graduated cylinder, E is the vacuum gauge, and q is the vacuum pump.
テスターＡに溶射膜体Ｂをセットし、テスターＡに一定
量水を注入し、バルブＣ１を開いて真空ポンプＶによっ
て吸引し、単位時間当りの吸引水量を測定すれば、溶射
膜体Ｂの気孔率を知ることができ、これからピンホール
の発生状況を知ることができる。Thermal sprayed film body B is set in tester A, a certain amount of water is injected into tester A, the valve C1 is opened, the vacuum pump V sucks water, and the amount of suction water per unit time is measured. You can know the rate, and from this you can know the status of pinhole occurrence.
このように、この発明に係るセラミックの溶射膜体は、
フィルターのＰ材として利用できるばかりでなく、従来
、測定が困難であったセラミックの溶射膜体の気孔率を
簡単に知ることができるもので、セラミックコーティン
グ上も大いに役立つもので、工業上得られる利益は著大
なものである。In this way, the ceramic sprayed film body according to the present invention is
Not only can it be used as a P material for filters, but it can also be used to easily determine the porosity of ceramic sprayed coatings, which has traditionally been difficult to measure.It is also very useful for ceramic coatings, and can be obtained industrially. The benefits are significant.
第１図は、この発明に用いるメタルメツシュの一部の平
面図、第２図は、その断面図、第３図は、セラミックの
溶射状態を示す模式図、第４図は、溶射膜体の気孔率を
測定する方法の概念図である。
第１９
３ｆｆｉFig. 1 is a plan view of a part of the metal mesh used in the present invention, Fig. 2 is a sectional view thereof, Fig. 3 is a schematic diagram showing the state of thermal spraying of ceramic, and Fig. 4 is a pore of the thermal sprayed film body. FIG. 2 is a conceptual diagram of a method of measuring the rate. 19th 3ffi
Claims (2)
ッシュ面に、直径４０μｍ以下の粒子のセラミックを溶
射付着させたセラミックの溶射膜体。(1) A ceramic sprayed film body in which ceramic particles with a diameter of 40 μm or less are sprayed onto a metal mesh surface having fine holes with a diameter of 100 μm or less.
ルメッシュ面にセラミックの微細粉末を溶射付着させ、
この溶射膜体を真空吸引源に接続した試験器に取付け、
直接真空吸引してその気孔率を測定することを特長とす
る溶射膜体の気孔率の測定方法。(2) Fine ceramic powder is thermally sprayed onto a metal mesh surface with fine pores whose porosity is known in advance,
Attach this sprayed film body to a tester connected to a vacuum suction source,
A method for measuring the porosity of a thermally sprayed film body, which is characterized by measuring the porosity by direct vacuum suction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12346790A JPH0419541A (en) | 1990-05-14 | 1990-05-14 | Ceramic melt-sprayed body and measuring method for its porosity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12346790A JPH0419541A (en) | 1990-05-14 | 1990-05-14 | Ceramic melt-sprayed body and measuring method for its porosity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0419541A true JPH0419541A (en) | 1992-01-23 |
Family
ID=14861354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12346790A Pending JPH0419541A (en) | 1990-05-14 | 1990-05-14 | Ceramic melt-sprayed body and measuring method for its porosity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0419541A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6228271B1 (en) * | 1996-05-28 | 2001-05-08 | Omnium De Traitement Et De Valorisation (Otv) | Method and installation for in situ testing of membrane integrity |
| CN103308439A (en) * | 2013-06-18 | 2013-09-18 | 北京科技大学 | Method for evaluating effective porosity of metal corrosion product film |
| CN104568701A (en) * | 2014-12-30 | 2015-04-29 | 西安公路养护技术工程研究中心有限公司 | Method and device for measuring maximum water discharge amount of porous pavement |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4960992A (en) * | 1972-09-25 | 1974-06-13 | ||
| JPS5396561A (en) * | 1977-02-03 | 1978-08-23 | Suzuki Metal Industry Co Ltd | Heat resisting shutter curtain member |
| JPS63274702A (en) * | 1987-05-01 | 1988-11-11 | Mitsubishi Metal Corp | Mesh belt for sintering furnace |
-
1990
- 1990-05-14 JP JP12346790A patent/JPH0419541A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4960992A (en) * | 1972-09-25 | 1974-06-13 | ||
| JPS5396561A (en) * | 1977-02-03 | 1978-08-23 | Suzuki Metal Industry Co Ltd | Heat resisting shutter curtain member |
| JPS63274702A (en) * | 1987-05-01 | 1988-11-11 | Mitsubishi Metal Corp | Mesh belt for sintering furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6228271B1 (en) * | 1996-05-28 | 2001-05-08 | Omnium De Traitement Et De Valorisation (Otv) | Method and installation for in situ testing of membrane integrity |
| CN103308439A (en) * | 2013-06-18 | 2013-09-18 | 北京科技大学 | Method for evaluating effective porosity of metal corrosion product film |
| CN104568701A (en) * | 2014-12-30 | 2015-04-29 | 西安公路养护技术工程研究中心有限公司 | Method and device for measuring maximum water discharge amount of porous pavement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5492623A (en) | Laminated filter material, its fabricating method and filter using a laminated filter material | |
| CA1325389C (en) | Sintered coating for porous metallic filter surfaces | |
| US6355082B1 (en) | Metal filter | |
| US6652804B1 (en) | Method for producing an openly porous sintered metal film | |
| JP4730863B2 (en) | Casting process and mold face coat slurry | |
| JPH0431728B2 (en) | ||
| DE1242656T1 (en) | METHOD AND DEVICE FOR SUPPLYING PRECURSORS TO SEVERAL EPITAXIS REACTORS | |
| JPH0693123A (en) | Porous polytetrafluoroethylene structure and its preparation | |
| JPH0419541A (en) | Ceramic melt-sprayed body and measuring method for its porosity | |
| GB1605214A (en) | Method of and apparatus for producing tubular filter element | |
| US5190094A (en) | Heteroporous form tool for manufacturing casting moulds and process for its manufacture | |
| JP3698906B2 (en) | Multi-layer honeycomb filter and manufacturing method thereof | |
| JP7412510B2 (en) | ceramic filter | |
| JPH03284329A (en) | Ceramic membraneous filter and production thereof | |
| US3520711A (en) | Method of coating a permeable sand core body | |
| JPS6039412B2 (en) | Manufacturing method and device for tubular filter member | |
| Park et al. | Preparation and characterization of porous composite filter medium by polytetrafluoroethylene foam coating | |
| Reddy et al. | A new technique for measurement of the strength of ceramic shells in the precision casting process | |
| JP2857494B2 (en) | Laminated filter medium and filter using this laminated filter medium | |
| JPH02104461A (en) | Vacuum anti-gravity type casting device and method for casting thin part | |
| JPH03284328A (en) | Ceramic membraneous filter and production thereof | |
| JPS60221169A (en) | Filter medium for molten metal | |
| CN212171325U (en) | 3D printing apparatus accessory | |
| RU2536536C1 (en) | Method of obtaining of porous permeable ceramic article | |
| SU1486498A1 (en) | Method of producing highly porous articles from high-melting materials |