SU685718A1 - Method of preparing plating based on tungsten and molybdenum - Google Patents
Method of preparing plating based on tungsten and molybdenumInfo
- Publication number
- SU685718A1 SU685718A1 SU782568352A SU2568352A SU685718A1 SU 685718 A1 SU685718 A1 SU 685718A1 SU 782568352 A SU782568352 A SU 782568352A SU 2568352 A SU2568352 A SU 2568352A SU 685718 A1 SU685718 A1 SU 685718A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- tungsten
- molybdenum
- plating based
- preparing plating
- preparing
- Prior art date
Links
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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/32—Carbides
Description
3 бочей температуре 2000С снижаетс до 9 кг/мм, что близко к пределу прочности столбчатого вольфрама 7 кг/мм. Целью изобретени вл етс повышение жаропрочности получаемых покры тий. Цель достигаетс тем, что в газообразную смесь дополнительно ввод т 5-25 мол. % четыреххлористого циркони и процесс ведут при 1100-1бОО С, Предложенный способ обеспечи вает благопри тные термодинамические услови дл образовани и равномерного распределени в структуре осаж даемого металла частиц карбида цирк ни , которые более дисперсны, чем частицы карбида вольфрама, и более УСТОЙЧИВЫ к высокотемпературному воздействию. В результате предел прочности, например, дл вольфрама повьвааетс по Сравнению с известным способом в 2,5-3,0 раза при рабочей температуре и в 1,5-2,0 раза при 2000 С. Максимальна температура , при которой сохран етс эффект упрочнени , равна дл предложенного способа . 8 Снижение температуры осаждени ниже способствует образованию нар ду с карбидом циркони значительных количеств карбида вольфрама; увеличение температуры выше сопровозкдаетс разложением четыреххлористого циркони в объеме. В обоих случа х ухудшаетс качество получаемых покрытий. Давление в системе не играет существенной роли и может измен тьс в широком интервале (1-760 мм.рт.ст.). Пример. Молибденовую трубку размере 4x0,5 мм помещают в реакционную камеру и нагревают пр мым пропусканием электрического тока. Через реакционную камеру пропускгиот газообразную смесь фторкда вольфрама или молибдена, четыреххлористого циркони , метана и водорода. После охлаждени сло толщиной 1,0-1,5 мм подложку с осалсденным покрытием разрезают на заготовки, удал ют подложку и полученные образцы испытывают на прочность при различных температурах. Услови проведени процесса и результаты испытаний представлены в таблице.The 3 barrel temperature of 2000 ° C is reduced to 9 kg / mm, which is close to the ultimate strength of the columnar tungsten 7 kg / mm. The aim of the invention is to increase the heat resistance of the coatings obtained. The goal is achieved by the addition of 5-25 mol% to the gaseous mixture. The process is carried out at 1100-1 BOO C, the proposed method provides favorable thermodynamic conditions for the formation and uniform distribution in the structure of the deposited metal of zirconium carbide particles that are more dispersed than the particles of tungsten carbide and more resistant to high temperature effects . As a result, the tensile strength, for example, for tungsten is twisted by a factor of 2.5-3.0 compared with a known method 2.5-3.0 times at an operating temperature and 1.5-2.0 times at 2000 C. The maximum temperature at which the strengthening effect is maintained , equal to the proposed method. 8 Lowering the precipitation temperature below contributes to the formation of significant amounts of tungsten carbide along with zirconium carbide; an increase in temperature above accompanying the decomposition of zirconium tetrachloride in bulk In both cases, the quality of the coatings is deteriorated. The pressure in the system does not play a significant role and can vary over a wide range (1-760 mm Hg). Example. A 4x0.5 mm molybdenum tube is placed in the reaction chamber and heated by direct passing an electric current. Through the reaction chamber passes a gaseous mixture of fluoride tungsten or molybdenum, zirconium tetrachloride, methane and hydrogen. After cooling the layer with a thickness of 1.0-1.5 mm, the substrate with the ossified coating is cut into blanks, the substrate is removed, and the samples obtained are tested for strength at various temperatures. The process conditions and test results are presented in the table.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782568352A SU685718A1 (en) | 1978-01-10 | 1978-01-10 | Method of preparing plating based on tungsten and molybdenum |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782568352A SU685718A1 (en) | 1978-01-10 | 1978-01-10 | Method of preparing plating based on tungsten and molybdenum |
Publications (1)
Publication Number | Publication Date |
---|---|
SU685718A1 true SU685718A1 (en) | 1979-09-15 |
Family
ID=20743967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU782568352A SU685718A1 (en) | 1978-01-10 | 1978-01-10 | Method of preparing plating based on tungsten and molybdenum |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU685718A1 (en) |
-
1978
- 1978-01-10 SU SU782568352A patent/SU685718A1/en active
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