CN102127731A - Method for preparing porous metal substrate with high temperature oxidation resistance - Google Patents
Method for preparing porous metal substrate with high temperature oxidation resistance Download PDFInfo
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- CN102127731A CN102127731A CN 201110039701 CN201110039701A CN102127731A CN 102127731 A CN102127731 A CN 102127731A CN 201110039701 CN201110039701 CN 201110039701 CN 201110039701 A CN201110039701 A CN 201110039701A CN 102127731 A CN102127731 A CN 102127731A
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Abstract
The invention provides a method for preparing a porous metal substrate with high temperature oxidation resistance, comprising the following steps of: mixing chromium source powder, a filler and activator in a certain proportion to be uniform and then drying, preparing mixed powder capable of providing active chromium atoms, then embedding a porous metal substrate into the mixed powder, processing for a period of time at the temperature of 900-1200 DEG C, cooling, and taking the material out of the powder. The method provided by the invention produces no waste water or waste gas,bascially no pollution is produced to the environment, and the environmental performance is good; and alloy layers containing chromium metal can be formed inside and outside skeleton ribs on the porous metal substrate by adopting the method, and the high temperature oxidation resistance of the prepared porous metal material can be greatly improved.
Description
Technical field
The present invention relates to a kind of preparation method, particularly the preparation method of the porous metal substrate of high temperature resistance function with porous metal substrate of specific function.
Background technology
For improving the resistance to elevated temperatures of porous metal substrate, forming the alloy layer that contains chromium thereon is a kind of good mode, and on porous metal substrate, forming the at present Direct Electroplating methods that adopt of a kind of like this alloy plating method more, the composite plating method, technologies such as thermospray, though each tool advantage of these methods, electrochemical plating coating is even, thermospray is quick etc., but their shortcoming also should not be underestimated, it is poor to be mainly reflected in plating and composite depositing process environmental-protecting performance, hot spray process then can not form effective chrome-bearing alloy coating, and simultaneously these methods contain the resistance to elevated temperatures of porous metal material of alloy layer of chromium for formation still not fully up to expectations, limited the application of material.
Summary of the invention
The present invention aims to provide the method that a kind of technology environmental-protecting performance is better, can improve the porous material resistance to elevated temperatures.
The present invention realizes by following proposal:
The method of the porous metal substrate of preparation resistance to high temperature oxidation may further comprise the steps,
The first step: chromium source power, weighting agent and activator are mixed back and dry by a certain percentage, be prepared into the mixed powder that the active chromium atom is provided; Described chromium source power is a kind of in chromium powder or the ferrochrome powder, and weighting agent is one or more in aluminum oxide powder, carborundum powder or the Zirconium oxide powder, and activator is the ammonium halide powder;
Second step: porous metal substrate is imbedded in the above-mentioned mixed powder, handled certain hour afterwards under 900～1200 ℃ of conditions, the material that take out in the powder cooling back gets final product.
For forming the good chromium metal coating that contains, improve the high temperature oxidation resistance of porous material, each composition ratio of described mixed powder is the chromium source power: weighting agent: activator is (10～60%): (30～80%): (0.3～10%).The particle diameter of described chromium source power particle diameter and weighting agent powder is identical and less than the porous metal aperture, generally can be 100～800 orders, more preferably 200～500 orders.
Consider concrete applied environment, a kind of in the preferred following base material of described porous metal substrate: nickel porous, porous copper, porous iron, porous iron nickelalloy or porous cupronickel, its thickness can be 0.5～100mm, the aperture can be 5～140PPI.
Described heat treatment time generally can be 1～10h, preferred 2～6h.
Compare with existing technology, preparation method of the present invention has following advantage:
1. because of the inventive method is a dry process, no waste water, waste gas produce, and can not produce environment substantially and pollute, so its environmental-protecting performance is good.
By the inventive method can be on porous metal substrate the inside and outside of skeleton rib all form the alloy layer that contains the chromium metal, can improve the high temperature oxidation resistance of the porous metal material that makes at last greatly, experiment is found, the general material that adopts the inventive method preparation its 900 ℃ of circulations more than 10 hours its material still can meet service requirements, the material of prepared such as electroplating chromium then just becomes fragile about 10 hours, and material can not use.
Description of drawings
The Electronic Speculum figure of the internal surface of the nickel porous material of Fig. 1 a: embodiment 1
The internal surface coating ultimate analysis figure of the nickel porous material of Fig. 1 b: embodiment 1
The Electronic Speculum figure of the outside surface of the nickel porous material of Fig. 2 a: embodiment 1
The outside surface coating ultimate analysis figure of the nickel porous material of Fig. 2 b: embodiment 1
Embodiment
Embodiment 1
Prepare the nickel porous material of resistance to high temperature oxidation by following step,
The first step: evenly the back is also dry by following mixed with chromium powder, aluminum oxide powder and ammonium chloride powders, and chromium powder: aluminum oxide powder: ammonium chloride=30: 68: 2 is prepared into the mixed powder that contains the active chromium atom;
Second step: 45PPI, 10mm is thick, 4000g/m
2A square meter nickel foam base material imbed in the above-mentioned mixed powder, under 1020 ℃ of conditions, handled 3 hours afterwards, the material that take out in the powder cooling back gets final product.
The nickel porous material of above-mentioned taking-up is observed its skeleton rib internal surface and outside surface under the high power Electronic Speculum, and through ultimate analysis, and the corresponding element analysis is respectively shown in Fig. 1 a and Fig. 1 b, the Electronic Speculum figure of outside surface and corresponding element analysis are respectively shown in Fig. 2 a and Fig. 2 b, its result shows that outside surface all has nickel and two kinds of elements of chromium within it, explanation has formed nichrome coating through aforesaid method on the nickel porous material thus.After testing, the material chromising layer weightening finish 28% that make of above-mentioned technology.
Resistance to elevated temperatures for the foam nickel material of the Ni and Cr contained alloy that obtains of test method for preparing, difference is carried out 30 hours epoxidation experiments to nichrome nickel porous sample (contrast sample 2) and the invention described above sample of nickel porous standard (contrast sample 1), employing electrochemical plating at 900 ℃ under the same conditions, result of experiment shows, contrast sample 1 and contrast sample 2 just became fragile less than 10 hours, oxidation is obvious, the material of the present invention then increasing weight of oxidation after 30 hours still is lower than 8%, shows excellent high temperature oxidation resistance.
Embodiment 2
Prepare the nickel porous material of resistance to high temperature oxidation by following step,
The first step: evenly the back is also dry by following mixed with chromium powder, zirconia powder and ammonium chloride powders, and chromium powder: aluminum oxide powder: ammonium chloride=15: 80: 5 is prepared into the mixed powder that contains the active chromium atom;
Second step: 80PPI, 4mm is thick, 1200g/m
2The nickel porous base material imbed in the above-mentioned mixed powder, under 1100 ℃ of conditions, handled 1 hour afterwards, the material that take out in the powder cooling back gets final product.
After testing, material chromising layer that above-mentioned technology makes weightening finish 19%, and through Electronic Speculum and determination of elemental analysis all formed nichrome at the surfaces externally and internally of the skeleton rib of material.
The increasing weight of oxidation of nickel porous material after 30 hours of method for preparing is lower than 10%, shows excellent high temperature oxidation resistance.
Embodiment 3
The porous iron nickel material that contains iron-nickel-chromium for preparing resistance to high temperature oxidation by following step:
The first step: 100 order chromium powders, 100 order aluminium powders, 100 order carborundum powders and ammonium chloride powders are pressed chromium powder: aluminium powder: carborundum powder: ammonium chloride powders=24: 1: 70: 5 mixed are back and dry evenly, is prepared into high temperature resistant penetration enhancer powder;
Second step: with the aperture is that 10PPI, thickness are that 50mm, area density are 15000g/m
2The Ni-based material of porous iron imbed in the above-mentioned mixed powder, under 900 ℃ of conditions, handled 6 hours afterwards, the material that take out in the powder cooling back gets final product.
After testing, material infiltration layer that above-mentioned technology makes weightening finish 30%, and through Electronic Speculum and determination of elemental analysis has all formed the iron nichrome aluminum alloy at the surfaces externally and internally of the skeleton rib of material.The porous iron nickel that contains the high temperature alloy layer that aforesaid method makes was 900 ℃ of oxidation cycle 30 hours, and experimental result is found, 30 hours increasing weight of oxidation 8%, and material property still keeps.
Embodiment 4
The porous iron material for preparing the resistance to high temperature oxidation alloy layer by following step:
The first step: 400 order ferrochrome powder, 400 order kaolin powders (through 1100 ℃ of roasting 1h) and ammonium chloride powders are pressed the ferrochrome powder: aluminum oxide powder: also dry after ammonium chloride powders=mixed was even in 55: 50: 5, be prepared into high temperature resistant penetration enhancer powder;
Second step: with the aperture is that 120PPI, thickness are that 1.5mm, area density are 800g/m
2Porous copper base material imbed in the above-mentioned mixed powder, under 1000 ℃ of conditions, handled 3 hours afterwards, the material that take out in the powder cooling back gets final product.
After testing, the weightening finish of material infiltration layer that above-mentioned technology makes is 20%, and through Electronic Speculum and determination of elemental analysis, has all formed iron-nickel-chromium at the surfaces externally and internally of the skeleton rib of material.The porous copper that contains the iron-nickel-chromium layer that aforesaid method makes was 900 ℃ of oxidation cycle 30 hours, and experimental result is found, 30 hours increasing weight of oxidation 10%, and material property still keeps.
Claims (8)
1. method for preparing the porous metal substrate of resistance to high temperature oxidation is characterized in that: may further comprise the steps,
The first step: chromium source power, weighting agent and activator are mixed back and dry by a certain percentage, be prepared into the mixed powder that the active chromium atom is provided; Described chromium source power is a kind of in chromium powder or the ferrochrome powder, and weighting agent is one or more in aluminum oxide powder, carborundum powder or the Zirconium oxide powder, and activator is the ammonium halide powder;
Second step: porous metal substrate is imbedded in the above-mentioned mixed powder, handled certain hour afterwards under 900～1200 ℃ of conditions, the material that take out in the powder cooling back gets final product.
2. the method for the porous metal substrate of preparation resistance to high temperature oxidation as claimed in claim 1 is characterized in that: each composition ratio of described mixed powder is the chromium source power: weighting agent: activator is (10～60%): (30～80%): (0.3～10%).
3. the method for the porous metal substrate of preparation resistance to high temperature oxidation as claimed in claim 2 is characterized in that: the particle diameter of described chromium source power particle diameter and weighting agent powder is identical and less than the porous metal aperture.
4. the method for the porous metal substrate of preparation resistance to high temperature oxidation as claimed in claim 3 is characterized in that: the particle diameter of described metal-powder particle diameter and weighting agent powder is 100～800 orders.
5. the method for the porous metal substrate of preparation resistance to high temperature oxidation as claimed in claim 4 is characterized in that: the particle diameter of described metal-powder particle diameter and weighting agent powder is for being preferably 200～500 orders.
6. as the method for the porous metal substrate of the described preparation resistance to high temperature oxidation of one of claim 1～5, it is characterized in that: a kind of in the preferred following base material of described porous metal substrate: nickel porous, porous copper, porous iron, porous iron nickelalloy or porous cupronickel.
7. the method for the porous metal substrate of preparation resistance to high temperature oxidation as claimed in claim 1 is characterized in that: described heat treatment time is 1～10h.
8. the method for the porous metal substrate of preparation resistance to high temperature oxidation as claimed in claim 7 is characterized in that: the preferred 2～6h of described heat treatment time.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104630635A (en) * | 2015-03-05 | 2015-05-20 | 北京矿迪科技有限公司 | Iron-chromium-aluminum-based porous metal material and preparation method thereof |
| WO2024036691A1 (en) * | 2022-08-16 | 2024-02-22 | 沈伟 | Foam nichrome and preparation method therefor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5674610A (en) * | 1995-03-24 | 1997-10-07 | General Electric Company | Method for chromium coating a surface and tape useful in practicing the method |
| JP2002180280A (en) * | 2000-12-18 | 2002-06-26 | National Institute Of Advanced Industrial & Technology | Azeotropic or azeotropic-like composition consisting of fluorine-contained ether and alcohols |
| US20060029168A1 (en) * | 2000-02-07 | 2006-02-09 | Chuang Justin C | Method for near optimal joint channel estimation and data detection for COFDM systems |
| CN101229699A (en) * | 2007-01-25 | 2008-07-30 | 长沙力元新材料股份有限公司 | Lacunaris metal carrier and manufacturing method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5674610A (en) * | 1995-03-24 | 1997-10-07 | General Electric Company | Method for chromium coating a surface and tape useful in practicing the method |
| US20060029168A1 (en) * | 2000-02-07 | 2006-02-09 | Chuang Justin C | Method for near optimal joint channel estimation and data detection for COFDM systems |
| JP2002180280A (en) * | 2000-12-18 | 2002-06-26 | National Institute Of Advanced Industrial & Technology | Azeotropic or azeotropic-like composition consisting of fluorine-contained ether and alcohols |
| CN101229699A (en) * | 2007-01-25 | 2008-07-30 | 长沙力元新材料股份有限公司 | Lacunaris metal carrier and manufacturing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104630635A (en) * | 2015-03-05 | 2015-05-20 | 北京矿迪科技有限公司 | Iron-chromium-aluminum-based porous metal material and preparation method thereof |
| WO2024036691A1 (en) * | 2022-08-16 | 2024-02-22 | 沈伟 | Foam nichrome and preparation method therefor |
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Effective date of registration: 20160628 Address after: Lotus pond neighborhood 415000 Changde city in Hunan Province Economic and Technological Development Zone Changde Hill Street office fourteen groups Patentee after: Changde Liyuan New Material Co., Ltd. Address before: 410100 No. 16 Xingsha Avenue, Changsha economic and Technological Development Zone, Hunan Patentee before: Changsha Liyuan New Material Co., Ltd. |