SU1740475A1 - Process for preparing porous articles - Google Patents
Process for preparing porous articles Download PDFInfo
- Publication number
- SU1740475A1 SU1740475A1 SU904825834A SU4825834A SU1740475A1 SU 1740475 A1 SU1740475 A1 SU 1740475A1 SU 904825834 A SU904825834 A SU 904825834A SU 4825834 A SU4825834 A SU 4825834A SU 1740475 A1 SU1740475 A1 SU 1740475A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- heating
- carried out
- porosity
- mixture
- preparing porous
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 4
- 150000002843 nonmetals Chemical class 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000003786 synthesis reaction Methods 0.000 claims description 6
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000000137 annealing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Catalysts (AREA)
Abstract
Сущность изобретени : прессуют смесь порошков металлов с неметаллами. Осуществл ют нагрев до 800-1050°С с выдержкой не менее 30 мин, затем инициируют реакцию СВСSUMMARY OF THE INVENTION: A mixture of metal powders with non-metals is compressed. Heating is carried out to 800-1050 ° C with a shutter speed of at least 30 minutes, then the SHS reaction is initiated.
Description
Изобретение относитс к порошковой технологии и может быть использовано при изготовлении пористых деталей, например фильтров из тугоплавких материалов.The invention relates to powder technology and can be used in the manufacture of porous parts, for example filters made of refractory materials.
Известна технологи получени пористых деталей в режиме самораспростран ющегос высокотемпературного синтеза (СВС), заключающа с в вакуумном отжиге в интервале температур 700-900°С в течение 10-20 мин.The technology of obtaining porous parts in the mode of self-propagating high-temperature synthesis (SHS) is known, consisting in vacuum annealing in the temperature range 700-900 ° C for 10-20 minutes.
Однако по такой технологии невозможно получение высокопористых изделий с регулируемой пористостью и сохранением формы издели .However, according to this technology, it is impossible to obtain highly porous products with adjustable porosity and preservation of the product shape.
Известна технологи получени пористых деталей способом СВС, включающем прессование смеси порошков металлов с неметаллами, нагрев с выдержкой и инициирование реакции самораспростран ющегос высокотемпературного синтеза, причем нагрев прессованную смесь электрическим током вначале до 400-700°С с выдержкой в течение 3-5 с. затем увеличиваютThe technology of obtaining porous parts by the method of SHS is known, which involves pressing a mixture of metal powders with non-metals, heating with a holding and initiating the reaction of self-propagating high-temperature synthesis, with the heating of the pressed mixture with an electric current initially up to 400-700 ° C. then increase
температуру до самовоспламенени , причем процесс нагрева провод т при непрерывном сжатии до 0,5-5 атм.temperature before self-ignition, and the heating process is carried out under continuous compression to 0.5-5 atm.
Недостаток этого способа - невозможность регулировани величины и характера пористости, причем величина пористости составл ет только 4...12%.The disadvantage of this method is the impossibility of controlling the size and nature of the porosity, and the value of the porosity is only 4 ... 12%.
Цель изобретени - повышение пористости издели .The purpose of the invention is to increase the porosity of the product.
Поставленна цель достигаетс тем, что в известном способе изготовлени пористых изделий, включающем прессование смеси порошков металлов с неметаллами, нагрев с выдержкой и инициирование реакции самораспростран ющегос высокотемпературного синтеза, нагрев осуществл ют до 800-1050°С с выдержкой не менее 30 минThe goal is achieved by the fact that in the known method of manufacturing porous products, including pressing a mixture of metal powders with non-metals, heating with a holding and initiating the reaction of self-propagating high-temperature synthesis, heating is carried out to 800-1050 ° C with a holding of at least 30 minutes
Пример 1. Смешали 800 г порошка титана марки ПТХ и 200 г порошка углерода марки ЗГ-0, которые смешивали в среде бензина с пластификатором в течение 40 ч Затем шихту просушили в вакуумном шкафуExample 1. 800 g of PTH grade titanium powder and 200 g of ZG-0 brand carbon powder were mixed, which were mixed in a gasoline medium with a plasticizer for 40 hours. Then the mixture was dried in a vacuum cabinet.
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при 170±5°С в вакууме 1...2 мм рт.ст. После этого из шихты спрессовали заготовки и подвергли их отжигу при 800°С в течение 1 ч. Затем заготовки подожгли. После остывани полученных изделий они были извлечены . Пористость составила 80-85%.at 170 ± 5 ° С in vacuum 1 ... 2 mm Hg. After that, billets were pressed from the charge and annealed at 800 ° C for 1 hour. Then the blanks were set on fire. After cooling the obtained products, they were extracted. The porosity was 80-85%.
Пример 2. Изготовили заготовки аналогично примеру 1. Отжиг провели при 925°С в течение 1 ч. Пористость составила 70-75%.Example 2. Manufactured blanks as in example 1. Annealing was carried out at 925 ° C for 1 h. The porosity was 70-75%.
Пример 3. Изготовили заготовки аналогично примеру 1. Отжиг провели при 1050°С в течение 1 ч. Пористость 50- 60%.Example 3. Manufactured blanks as in example 1. Annealing was carried out at 1050 ° C for 1 h. Porosity 50-60%.
Пример 4. Изготовили заготовки аналогично примеру 1. Отжиг провели в течение 30 мин при 1000°С. Пористость 70- 80%.Example 4. Manufactured blanks as in example 1. Annealing was carried out for 30 min at 1000 ° C. The porosity is 70-80%.
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5five
Пример 5. Изготовили заготовки аналогично примеру 1. Отжиг провели в течение 25 мин при 800°С. Спекани изделий не произошло. Продукт рассыпалс в порошок . Этот пример показывает, что уменьшение времени отжига приводит к разрушению продукта. Кроме того, отмечаетс значительное опасное газоотделение.Example 5. Produced blanks as in example 1. Annealing was carried out for 25 min at 800 ° C. Product tins did not occur. The product is pulverized. This example shows that reducing the annealing time leads to the destruction of the product. In addition, there is significant hazardous gas separation.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU904825834A SU1740475A1 (en) | 1990-03-11 | 1990-03-11 | Process for preparing porous articles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU904825834A SU1740475A1 (en) | 1990-03-11 | 1990-03-11 | Process for preparing porous articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1740475A1 true SU1740475A1 (en) | 1992-06-15 |
Family
ID=21514520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU904825834A SU1740475A1 (en) | 1990-03-11 | 1990-03-11 | Process for preparing porous articles |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1740475A1 (en) |
-
1990
- 1990-03-11 SU SU904825834A patent/SU1740475A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Технологи . Межотраслевой научно-технический сборник. Сер. Оборудование, материалы, процессы, М., 1988, вып.1, с.24. Авторское свидетельство СССР № 584052,кл. В 22 F 3/24, 1975. * |
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