SU983810A1 - Coating forming method - Google Patents
Coating forming method Download PDFInfo
- Publication number
- SU983810A1 SU983810A1 SU782695251A SU2695251A SU983810A1 SU 983810 A1 SU983810 A1 SU 983810A1 SU 782695251 A SU782695251 A SU 782695251A SU 2695251 A SU2695251 A SU 2695251A SU 983810 A1 SU983810 A1 SU 983810A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- metal
- forming method
- coating
- coating forming
- graphite
- Prior art date
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- Chemical Vapour Deposition (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Laminated Bodies (AREA)
- Cold Cathode And The Manufacture (AREA)
Description
(54) СПОСОБ ОБРАЗОВАНИЯ ПОКРЫТИЯ(54) METHOD OF COVERING EDUCATION
1one
Изобретение относитс к электронной . технике и может бь1ть использовано при изготовлении материалов дл электродов электронно-вакуумных и газоразр дных. приборов.FIELD: electronic. Technique and can be used in the manufacture of materials for electrodes, electron-vacuum and gas discharge. devices.
Известен способ образовани покрыти дл электродов из тугоплавких металлов путем осалодени углерода на поверхность металла С1 J .A known method of forming a coating for refractory metal electrodes is by sedimentation of carbon onto the surface of a C1 J metal.
Однако такой способ в р де случаев не обеспечивает требуемой эмиссионной способности при заданной механической прочности.However, this method in a number of cases does not provide the required emissivity for a given mechanical strength.
Наиболее близким к изобретению по технической сущности вл етс способ образовани покрыти дл электродов из тугоплавких металлов, включающий нанесение на поверхность металла пиропити- ческого графита 2 .The closest to the invention in its technical essence is a method of forming a coating for electrodes made of refractory metals, comprising applying pyropitic graphite 2 to the metal surface.
По этому способу образование сло пиролитического графита осуществл етс в результате разложени углеводородов на прокаливаемой подложке. In this method, the formation of a pyrolytic graphite layer is carried out as a result of the decomposition of hydrocarbons on a hardenable substrate.
Недостатком известного способа вл етс карбидизирование поверхности, чтоA disadvantage of the known method is surface carbidization, which
приводит к изменению структуры металла, увеличивает его хрупкость, ухудшает термоэмиссионные параметры.leads to a change in the structure of the metal, increases its brittleness, worsens the thermal emission parameters.
Целью изобретени вл етс повышение 5 устойчивости к термоэмиссии и механической прочности. The aim of the invention is to increase the resistance to thermal emission and mechanical strength.
Указгшна цель достигаетс тем, что согласно способу образовани покрыти , включающему нанесение на поверхность 0 металла пиролитического графита, перед нанес&1ием графита на повбрхность металла последовательно нанос т гальваническим образом слон рени и металла платиновой группы толщиной 1-30 мкм, )5 каждый из которых после нанесени прокаливают в вакууме или защитной атиюофере при 120О-15ОО К до его равердрни .The target is achieved in that, according to the method of forming the coating, which involves the deposition of pyrolytic graphite metal on the surface 0, before the graphite is applied & on the surface of the metal, electrically electrolyte and platinum group metal 1-30 µm thick are sequentially galvanized 5 after application, it is calcined in vacuum or protective athyofer at 120 ° -15OOK K until it is rated.
Сущность способа основана ва том, что 20 металлы платиновой группы не образуют , карбидов, однако с другой стороны они не образуют хорошего сцеплени с тугоппавшми металлами, в частичности с фольфрвриом , молибденом, танталом. Дл этого 1спользуетс дополнительный слой рени .The essence of the method is based on the fact that 20 metals of the platinum group do not form carbides, but on the other hand they do not form a good adhesion with hard metal, in particular, with furfry, molybdenum, tantalum. For this, an extra layer of rhenium is used.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS805477A CS199103B1 (en) | 1977-12-02 | 1977-12-02 | Method of metallic details cover having high melting temperature,especially made from molybden,tantalum by pyrrolitic graphite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU983810A1 true SU983810A1 (en) | 1982-12-23 |
Family
ID=5430621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU782695251A SU983810A1 (en) | 1977-12-02 | 1978-12-01 | Coating forming method |
Country Status (5)
| Country | Link |
|---|---|
| CS (1) | CS199103B1 (en) |
| DD (1) | DD140482A1 (en) |
| HU (1) | HU177268B (en) |
| PL (1) | PL112532B2 (en) |
| SU (1) | SU983810A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH647815A5 (en) * | 1980-04-19 | 1985-02-15 | Kurt Fischer | PROCESS FOR BLACKING METAL SURFACES. |
| GB2254616A (en) * | 1991-04-11 | 1992-10-14 | Leonard Wisniewski | Anticorrosive coating composition |
| JP3044683B2 (en) * | 1995-03-17 | 2000-05-22 | 科学技術振興事業団 | Method for forming graphite layer, X-ray optical element having graphite layer formed by the method, and method for manufacturing X-ray optical element |
-
1977
- 1977-12-02 CS CS805477A patent/CS199103B1/en unknown
-
1978
- 1978-11-20 DD DD20919078A patent/DD140482A1/en not_active IP Right Cessation
- 1978-12-01 PL PL21140378A patent/PL112532B2/en unknown
- 1978-12-01 SU SU782695251A patent/SU983810A1/en active
- 1978-12-01 HU HUTE000917 patent/HU177268B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| HU177268B (en) | 1981-08-28 |
| PL211403A1 (en) | 1979-07-30 |
| PL112532B2 (en) | 1980-10-31 |
| DD140482A1 (en) | 1980-03-05 |
| CS199103B1 (en) | 1980-07-31 |
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