The Experts below are selected from a list of 36678 Experts worldwide ranked by ideXlab platform
Catherine Grosdemangebilliard - One of the best experts on this subject based on the ideXlab platform.
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short and efficient synthesis of a Stock Material of dihydroxyacetone phosphate from glycidol
Tetrahedron Letters, 2004Co-Authors: Odile Meyer, Michel Rohmer, Catherine GrosdemangebilliardAbstract:Abstract As enzymatic syntheses are expensive for a large-scale preparation of DHAP, a precursor leading to DHAP was synthesized in three steps starting from (±) glycidol; the stable benzylated Stock Material afforded by hydrogenolysis DHAP in high purity, which may be used directly without purification in enzymatic aldol synthesis.
Malko Gindrat - One of the best experts on this subject based on the ideXlab platform.
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vapor phase deposition using a plasma spray process
Journal of Engineering for Gas Turbines and Power-transactions of The Asme, 2011Co-Authors: Konstantin Von Niessen, Malko GindratAbstract:Plasma spray-physical vapor deposition (PS-PVD) is a low pressure plasma spray technology recently developed by Sulzer Metco AG (Switzerland) to deposit coatings out of the vapor phase. PS-PVD is developed on the basis of the well established low pressure plasma spraying technology. In comparison to conventional vacuum plasma spraying and low pressure plasma spraying, these new processes use a high energy plasma gun operated at a work pressure below 2 mbar. This leads to unconventional plasma jet characteristics, which can be used to obtain specific and unique coatings. An important new feature of PS-PVD is the possibility to deposit a coating not only by melting the feed Stock Material, which builds up a layer from liquid splats, but also by vaporizing the injected Material. Therefore, the PS-PVD process fills the gap between the conventional PVD technologies and standard thermal spray processes. The possibility to vaporize feedStock Material and to produce layers out of the vapor phase results in new and unique coating microstructures. The properties of such coatings are superior to those of thermal spray and electron beam-physical vapor deposition (EB-PVD) coatings. In contrast to EB-PVD, PS-PVD incorporates the vaporized coating Material into a supersonic plasma plume. Due to the forced gas stream of the plasma jet, complex shaped parts like multi-airfoil turbine vanes can be coated with columnar thermal barrier coatings using PS-PVD. Even shadowed areas and areas, which are not in the line-of-sight to the coating source, can be coated homogeneously. This paper reports on the progress made by Sulzer Metco to develop a thermal spray process to produce coatings out of the vapor phase. Columnar thermal barrier coatings made of yttria stabilized zircona are optimized to serve in a turbine engine. This includes coating properties like strain tolerance and erosion resistance but also the coverage of multiple air foils.
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plasma spray pvd a new thermal spray process to deposit out of the vapor phase
Journal of Thermal Spray Technology, 2011Co-Authors: Konstantin Von Niessen, Malko GindratAbstract:Plasma spray-physical vapor deposition (PS-PVD) is a low pressure plasma spray technology recently developed by Sulzer Metco AG (Switzerland). Even though it is a thermal spray process, it can deposit coatings out of the vapor phase. The basis of PS-PVD is the low pressure plasma spraying (LPPS) technology that has been well established in industry for several years. In comparison to conventional vacuum plasma spraying (VPS) or low pressure plasma spraying (LPPS), the new proposed process uses a high energy plasma gun operated at a reduced work pressure of 0.1 kPa (1 mbar). Owing to the high energy plasma and further reduced work pressure, PS-PVD is able to deposit a coating not only by melting the feed Stock Material which builds up a layer from liquid splats but also by vaporizing the injected Material. Therefore, the PS-PVD process fills the gap between the conventional physical vapor deposition (PVD) technologies and standard thermal spray processes. The possibility to vaporize feedStock Material and to produce layers out of the vapor phase results in new and unique coating microstructures. The properties of such coatings are superior to those of thermal spray and electron beam-physical vapor deposition (EB-PVD) coatings. In contrast to EB-PVD, PS-PVD incorporates the vaporized coating Material into a supersonic plasma plume. Owing to the forced gas stream of the plasma jet, complex shaped parts such as multi-airfoil turbine vanes can be coated with columnar thermal barrier coatings using PS-PVD. Even shadowed areas and areas which are not in the line of sight of the coating source can be coated homogeneously. This article reports on the progress made by Sulzer Metco in developing a thermal spray process to produce coatings out of the vapor phase. Columnar thermal barrier coatings made of Yttria-stabilized Zircona (YSZ) are optimized to serve in a turbine engine. This process includes not only preferable coating properties such as strain tolerance and erosion resistance but also the simultaneous coverage of multiple air foils.
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Vapor Phase Deposition Using a Plasma Spray Process
Volume 1: Aircraft Engine; Ceramics; Coal Biomass and Alternative Fuels; Education; Electric Power; Manufacturing Materials and Metallurgy, 2010Co-Authors: Konstantin Von Niessen, Malko GindratAbstract:Plasma spray - physical vapor deposition (PS-PVD) is a low pressure plasma spray technology recently developed by Sulzer Metco AG (Switzerland) to deposit coatings out of the vapor phase. PS-PVD is developed on the basis of the well established low pressure plasma spraying (LPPS) technology. In comparison to conventional vacuum plasma spraying (VPS) and low pressure plasma spraying (LPPS), these new process use a high energy plasma gun operated at a work pressure below 2 mbar. This leads to unconventional plasma jet characteristics which can be used to obtain specific and unique coatings. An important new feature of PS-PVD is the possibility to deposit a coating not only by melting the feed Stock Material which builds up a layer from liquid splats but also by vaporizing the injected Material. Therefore, the PS-PVD process fills the gap between the conventional physical vapor deposition (PVD) technologies and standard thermal spray processes. The possibility to vaporize feedStock Material and to produce layers out of the vapor phase results in new and unique coating microstructures. The properties of such coatings are superior to those of thermal spray and electron beam - physical vapor deposition (EB-PVD) coatings. In contrast to EB-PVD, PS-PVD incorporates the vaporized coating Material into a supersonic plasma plume. Due to the forced gas stream of the plasma jet, complex shaped parts like multi-airfoil turbine vanes can be coated with columnar thermal barrier coatings using PS-PVD. Even shadowed areas and areas which are not in the line of sight to the coating source can be coated homogeneously. This paper reports on the progress made by Sulzer Metco to develop a thermal spray process to produce coatings out of the vapor phase. Columnar thermal barrier coatings made of Yttria stabilized Zircona (YSZ) are optimized to serve in a turbine engine. This includes coating properties like strain tolerance and erosion resistance but also the coverage of multiple air foils.© 2010 ASME
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vapor phase deposition using plasma spray pvd
Journal of Thermal Spray Technology, 2010Co-Authors: Konstantin Von Niessen, Malko Gindrat, Arno RefkeAbstract:Plasma spray—physical vapor deposition (PS-PVD) is a low pressure plasma spray technology to deposit coatings out of the vapor phase. PS-PVD is a part of the family of new hybrid processes recently developed by Sulzer Metco AG (Switzerland) on the basis of the well-established low pressure plasma spraying (LPPS) technology. Included in this new process family are plasma spray—chemical vapor deposition (PS-CVD) and plasma spray—thin film (PS-TF) processes. In comparison to conventional vacuum plasma spraying and LPPS, these new processes use a high energy plasma gun operated at a work pressure below 2 mbar. This leads to unconventional plasma jet characteristics which can be used to obtain specific and unique coatings. An important new feature of PS-PVD is the possibility to deposit a coating not only by melting the feed Stock Material which builds up a layer from liquid splats, but also by vaporizing the injected Material. Therefore, the PS-PVD process fills the gap between the conventional PVD technologies and standard thermal spray processes. The possibility to vaporize feedStock Material and to produce layers out of the vapor phase results in new and unique coating microstructures. The properties of such coatings are superior to those of thermal spray and EB-PVD coatings. This paper reports on the progress made at Sulzer Metco to develop functional coatings build up from vapor phase of oxide ceramics and metals.
Odile Meyer - One of the best experts on this subject based on the ideXlab platform.
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short and efficient synthesis of a Stock Material of dihydroxyacetone phosphate from glycidol
Tetrahedron Letters, 2004Co-Authors: Odile Meyer, Michel Rohmer, Catherine GrosdemangebilliardAbstract:Abstract As enzymatic syntheses are expensive for a large-scale preparation of DHAP, a precursor leading to DHAP was synthesized in three steps starting from (±) glycidol; the stable benzylated Stock Material afforded by hydrogenolysis DHAP in high purity, which may be used directly without purification in enzymatic aldol synthesis.
Sanjib Kumar Karmee - One of the best experts on this subject based on the ideXlab platform.
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chemo enzymatic reaction sequence for the synthesis of dihydroxyacetone phosphate dhap Stock Material
ChemInform, 2013Co-Authors: Sanjib Kumar KarmeeAbstract:Glycerol is converted to the protected dihydroxy acetone precursor (XI) via a seven-step chemo-enzymatic methodology.
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chemo enzymatic reaction sequence for the synthesis of dihydroxyacetone phosphate dhap Stock Material
Synthetic Communications, 2013Co-Authors: Sanjib Kumar KarmeeAbstract:Abstract A chemoenzymatic synthesis of benzylated dihydroxyacetone phosphate precursor is described, starting from glycerol.
Michel Rohmer - One of the best experts on this subject based on the ideXlab platform.
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short and efficient synthesis of a Stock Material of dihydroxyacetone phosphate from glycidol
Tetrahedron Letters, 2004Co-Authors: Odile Meyer, Michel Rohmer, Catherine GrosdemangebilliardAbstract:Abstract As enzymatic syntheses are expensive for a large-scale preparation of DHAP, a precursor leading to DHAP was synthesized in three steps starting from (±) glycidol; the stable benzylated Stock Material afforded by hydrogenolysis DHAP in high purity, which may be used directly without purification in enzymatic aldol synthesis.
