EB-preheating of turbine blades — the completion of EB-technology for thermal barrier coating

Reinhold, E.; Deus, Carsten; Wenzel, B.; Wolkers, L.

doi:10.1016/s0257-8972(98)00692-6

Cited by 9 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Uniformity can be improved by using multiple evaporation sources that are distributed linearly in processes such as sputtering (Hill, 1986;Swann et al, 1990;Upadhye et al, 1988), but this is not a viable approach for EB-PVD because it is a line of sight deposition process. At present, best practice in EB-PVD leads to about 10 percent variance in deposition thickness in the final product (Reinhold et al, 1999). Any process improvements that lead to a reduction in this variance can be expected to reduce the total life-cycle cost of the manufactured products (Beele et al, 1999).…”

Section: Multilayered Rhenium Coatingmentioning

confidence: 99%

Rapid manufacturing of rhenium components using EB‐PVD

Prabhu

Fuke

Cho

et al. 2005

Rapid Prototyping Journal

View full text Add to dashboard Cite

Rapid manufacturing of rhenium components using EB-PVD Vittal V. Prabhu Indraneel V. Fuke Sohyung Cho Jogender Singh Article information:To cite this document: Vittal V.If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -The purpose of this paper is to provide insights for understanding the relationship between rapid manufacturing process for rhenium components in jet nozzle fabrication using electron beam-physical vapor deposition (EB-PVD). Specifically, to develop a methodology to characterize and improve this new process through motion planning for maintaining uniformity in the deposition thickness. Design/methodology/approach -This research first identifies several important objectives for the process, and then develops an optimized heuristic method based on a look-ahead approach to generate motion plans for uniform thickness objective. In this heuristic, the surface of the workpiece is modeled using finite element method and the accumulated thickness of each layer on each element is computed based on its location in the vapor plume using a ray casting algorithm. Findings -Computational experiments show that the proposed algorithm can potentially provide significant improvements in the uniformity of the layers and cost savings in manufacturing compared to prevailing practice, especially for low-volume production such as aerospace applications.Research limitations/implications -In this research, net-shaped jet nozzle has been fabricated using a graphite mandrel. Therefore, the mandrelbased approach can be limited to producing hollow components. Practical implications -The proposed method is very generic and thus can be applied for multi-material manufacturing process identifying the sweet spot of the intersecting vapor plumes. Originality/value -This research can help the EB-PVD process for rapid manufacturing which has been considered as financially expensive to be accepted in real practice by providing a relationship of the process-to-product transformation through the developed motion planning methods.

show abstract

Section: Multilayered Rhenium Coatingmentioning

confidence: 99%

Rapid manufacturing of rhenium components using EB‐PVD

Prabhu

Fuke

Cho

et al. 2005

Rapid Prototyping Journal

View full text Add to dashboard Cite

show abstract

“…This will make them non-repairable and increase the importance of process control for EB-PVD. 15 Because future engines will rely heavily on coatings to protect hot section components, accurate models will become essential to describe the attributes of manufacturing processes such as microstructure, rate of deposition, cost, etc. 10 In the future, current super alloys could be replaced by ceramics, intermetallics and refractory materials for higher temperature operations in various applications such as high speed civil transport, integrated high performance turbine engine technology and advanced turbine systems.…”

Section: Introductionmentioning

confidence: 99%

Motion planning for coating process optimisation in electron beam physical vapour deposition

Cho

Fuke²,

Prabhu

2005

Surface Engineering

View full text Add to dashboard Cite

Electron beam physical vapour deposition (EB-PVD) is used mainly in a variety of coating and surface engineering applications. The present research focuses on coating process optimisation using EB-PVD for turbine blades, which are widely used in industrial, marine and aircraft applications. More specifically, the present research identifies the five most important objectives for the EB-PVD coating process and then proposes metrics to quantify such objectives. In addition, a heuristic for EFB-PVD process optimisation is developed to control workpiece motion systematically to reduce coating thickness variance, providing a uniform coating for turbine blades. The heuristic developed is an iterative algorithm which uses a finite element model of the rotating workpiece to determine the translation motion. The finite element model can be readily generated using standard computer aided design (CAD) of the workpiece, which makes the method applicable to workpieces with complex three-dimensional geometry. These computational developments are illustrated using a simulation of a turbine blade coating in which the coating thickness variance is reduced significantly. The proposed method could eliminate dedicated tooling/fixtures used in the traditional coating process and improve the cost effectiveness of the process, especially for low volume production.

show abstract

Environmental Barrier Coatings (EBCs) for Ceramic Matrix Composites

Zhou,

Guo

2023

Engineering Materials

View full text Add to dashboard Cite

EB-preheating of turbine blades — the completion of EB-technology for thermal barrier coating

Cited by 9 publications

References 1 publication

Rapid manufacturing of rhenium components using EB‐PVD

Rapid manufacturing of rhenium components using EB‐PVD

Motion planning for coating process optimisation in electron beam physical vapour deposition

Environmental Barrier Coatings (EBCs) for Ceramic Matrix Composites

Contact Info

Product

Resources

About