Другие журналы

. A B C D E F G H I J K L M N O P R S T U V W Y Z К М С Т

Artemenko

Thermodynamic analysis of covering blades of gas-turbine engineы made of heatproof nickel alloys with protection diffusion coatings with tantalum undercoat
Engineering Education # 07, July 2013
DOI: 10.7463/0713.0583284
This work presents results of thermodynamic studies and searching for a rational chemical activation dopant for deposition of tantalum from the gaseous phase onto surfaces of parts of gas-turbine engines made of heatproof nickel alloys in order to increase the diffusion stability of heatproof aluminide coatings. Calculations showed a possibility of using nickel dichloride for tantalum and tantalum-chromium coating of nickel alloys. During this investigation several restrictions on the number of additional alloying elements in the saturating mixture were discovered. An effective amount of chromium for the combined process of tantalum-chromium coating was also determined.
Thermodynamic analysis of covering blades of a gas-turbine engine made of heatproof nickel alloys with protection diffusion coatings with hafnium undercoat
Engineering Education # 06, June 2013
DOI: 10.7463/0613.0577291
This work presents results of thermodynamic studies and searching for a rational chemical activation dopant for deposition of hafnium from the gaseous phase onto the surface of gas-turbine engine’s parts made of heatproof nickel alloys in order to increase diffusion stability of heatproof aluminide coatings. Calculations showed impossibility of using a traditional activation dopant, that is nickel dichloride, for hafnium coating because liberation of gaseous hafnium compounds occurs at temperatures which are beyond reach for modern equipment for thermochemical treatment. During this investigation it was established that ammonium chloride could be used as an activation dopant. If hafnium consists one fifth of ammonium chloride in the saturating mixture, amount of gaseous hafnium chloride reaches its maximum.
 
SEARCH
 
elibrary crossref ulrichsweb neicon rusycon
Photos
 
Events
 
News



Authors
Press-releases
Library
Conferences
About Project
Rambler's Top100
Phone: +7 (915) 336-07-65 (строго: среда; пятница c 11-00 до 17-00)
  RSS
© 2003-2020 «Наука и образование»
Перепечатка материалов журнала без согласования с редакцией запрещена
 Phone: +7 (915) 336-07-65 (строго: среда; пятница c 11-00 до 17-00)