Analysis of Induction Plasma Deposition Dynamics for Control

1995 ◽  
Vol 117 (3) ◽  
pp. 429-431
Author(s):  
K. S. Narendra ◽  
C. W. Smith ◽  
M. A. Gevelber
Keyword(s):  
Control Structure ◽  
Plasma Deposition ◽  
Corrosion And Wear ◽  
Matrix Composites ◽  
Nonlinear Dynamic Model ◽  
Wear Resistant Coatings ◽  
Plasma Torches ◽  
Near Net Shape ◽  
Insight Into ◽  
Induction Plasma Deposition

Plasma torches are used in a variety of different applications including forming corrosion and wear resistant coatings, near net shape manufacture, and production of metal matrix composites. The dynamics of a low order nonlinear dynamic model of the process are analyzed to obtain insight into developing an appropriate control structure.

Dynamic Modelling of CVD for Real-Time Control of Microstructure

1994 ◽  
Vol 363 ◽  
Author(s):  
M.A. Gevelber ◽  
M.T. Quiñones ◽  
M.L. Bufano
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Nonlinear Dynamic ◽  
Control Structure ◽  
Dynamic Modelling ◽  
Chemical Vapor ◽  
Real Time Control ◽  
Nonlinear Dynamic Model ◽  
Time Control ◽  
Insight Into

AbstractA nonlinear dynamic model of the chemical vapor deposition (CVD) process has been developed and analyzed to obtain insight into the design of an appropriate control structure.

scholarly journals Plasma Metal Deposition for Metallic Materials

2021 ◽  
Author(s):  
Enrique Ariza Galván ◽  
Isabel Montealegre Meléndez ◽  
Cristina Arévalo Mora ◽  
Eva María Pérez Soriano ◽  
Erich Neubauer ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Metal Deposition ◽  
Welding Parameters ◽  
Matrix Composites ◽  
Large Size ◽  
Wide Range ◽  
Direct Energy ◽  
Lightweight Alloys ◽  
Near Net Shape ◽  
Feedstock Material

Plasma metal deposition (PMD®) is a promising and economical direct energy deposition technique for metal additive manufacturing based on plasma as an energy source. This process allows the use of powder, wire, or both combined as feedstock material to create near-net-shape large size components (i.e., >1 m) with high-deposition rates (i.e., 10 kg/h). Among the already PMD® processed materials stand out high-temperature resistance nickel-based alloys, diverse steels and stainless steels commonly used in the industry, titanium alloys for the aerospace field, and lightweight alloys. Furthermore, the use of powder as feedstock also allows to produce metal matrix composites reinforced with a wide range of materials. This chapter presents the characteristics of the PMD® technology, the welding parameters affecting additive manufacturing, examples of different fabricated materials, as well as the challenges and developments of the rising PMD® technology.

scholarly journals Coatings of Carbide-Metal Systems (Cr3C2-NiCr and WC-Co-Cr) Deposited by High-Velocity Atmospheric Plasma Spraying from Specially Modified Fine-Grained Powders

2018 ◽  
Vol 1 (1) ◽  
pp. 18-23
Author(s):  
Vadim Verlotski ◽  
Keyword(s):  
Plasma Spraying ◽  
High Speed ◽  
Plasma Deposition ◽  
Thermal Spraying ◽  
Atmospheric Plasma ◽  
Metal Particles ◽  
Fine Grained ◽  
Plasma Torches ◽  
Carbide Coatings ◽  
Gas Tight

In this article, the author poses and responds to a provocative question that has practically ceased to be asked in the field of thermal spraying of carbide coatings: Is the current worldwide trend of using only unmelted metal particles to form coatings (HVOF, HVAF and cold spray methods) correct, and is the deposition of completely melted powders (plasma spraying methods) really outdated? The results of high-speed plasma deposition of new carbide powders allowed the author to prove that only coatings from molten particles can solve the main problem of such coatings, namely the problem of permeability along the grain boundaries. Through the use of modern Axial III plasma torches combined with optimized fine-grained powders, it has been possible to create Cr3C2-NiCr as well as WC-Co-Cr gas-tight layers.

Efficient Processing of Metal-Matrix-Composites by Combining Direct Pressure Sintering and Subsequent Thixoforging

2015 ◽  
Vol 825-826 ◽  
pp. 167-175
Author(s):  
Andreas Storz ◽  
Thomas Schubert ◽  
Thomas Weissgärber ◽  
Christoph Seyboldt ◽  
Kim Rouven Riedmüller
Keyword(s):  
Cost Effective ◽  
Special Importance ◽  
Matrix Composites ◽  
Homogeneous Microstructure ◽  
New Process ◽  
Direct Pressure ◽  
Efficient Processing ◽  
Near Net Shape ◽  
Semi Solid

The paper describes a cost effective and innovative combination of direct pressure sintering and subsequent thixoforming to produce MMC-components in (near-) net shape quality and, thus, to make these interesting materials attractive to mass production.First results of some combinations of aluminium matrix alloys with different ceramic reinforcements, consolidated by fast pressure sintering show the efficiency of this technology.The further processing of the consolidated billets has been performed by thixoforging. It can be shown, that the homogeneous microstructure from the direct pressure sintering stage with uniformly distributed ceramic reinforcements can be maintained over the semi-solid state and a full densification can be achieved. Form filling was complete and surface quality was comparable to forgings from conventional alloys.This new process flow shows advantages regarding the material yield in each of the processing steps. The (near-) net shape quality of thixoforged components allows a reduced effort for machining, which is of special importance for composite materials with a high content of wear resistant hard phases like SiC-particles.

Diamond coatings for tool shafts by induction plasma deposition

1998 ◽  
Vol 16 (3) ◽  
pp. 201-205 ◽  
Author(s):  
Jörg Oberste Berghaus ◽  
Jean-Luc Meunier ◽  
François Gitzhofer
Keyword(s):  
Plasma Deposition ◽  
Diamond Coatings ◽  
Induction Plasma ◽  
Induction Plasma Deposition

Modelling for control of induction plasma deposition

1995 ◽  
Vol 50 (23) ◽  
pp. 3747-3761
Author(s):  
C.W. Smith ◽  
K.S. Narendra ◽  
M.A. Gevelber
Keyword(s):  
Plasma Deposition ◽  
Induction Plasma ◽  
Induction Plasma Deposition

Fiber Reinforced Light Metal Composites by Thixoforging of Thermally Sprayed Prepregs

2006 ◽  
Vol 116-117 ◽  
pp. 370-374
Author(s):  
Rainer Gadow ◽  
Konstantin von Niessen ◽  
Peter Unseld
Keyword(s):  
Light Metal ◽  
Matrix Composites ◽  
Metal Composites ◽  
Metal Coatings ◽  
Cycle Times ◽  
Fiber Damage ◽  
Near Net Shape ◽  
Manufacturing Methods ◽  
Semi Solid ◽  
Thermally Sprayed

New manufacturing methods for metal matrix composites (MMC) are developed. Thermally sprayed metal coatings on reinforcement-fabrics are used as preforms (prepregs) for an advanced thixoforging process. The semi-solid forming and simultaneous infiltration in short cycle times offer the possibility to realize complex near net-shape geometries and reduces fiber damage to a minimum.

Research Status and Developing of Metal Injection Molding

2012 ◽  
Vol 629 ◽  
pp. 100-104 ◽  
Author(s):  
Yi Qiang He ◽  
Bin Qiao ◽  
Jian Ming Yang ◽  
Li Chao Feng
Keyword(s):  
Injection Molding ◽  
Technical Characteristic ◽  
Metal Injection Molding ◽  
Full Potential ◽  
Matrix Composites ◽  
High Efficient ◽  
The Status ◽  
Near Net Shape ◽  
Viable Method ◽  
Mim Technology

Metal injection molding(MIM) is a high efficient and near net shape manufacturing technology, which is appropriate for parts of small size and complex shape. MIM provides a viable method to fabricate metal and metal matrix composites with discontinuous reinforcements, and micro metal injection molding (μMIM) is applied to manufacturing products at micro scale. The status of the research and development of MIM and μMIM are reviewed. Processes including mixing, injection molding and subsequent debinding and sintering are summarized. And technical characteristic, injection processing and application of μMIM are introduced. The disadvantages in mixing, injection molding and debinding processes limit MIM to fabricating components with small size, low precision and mechanical properties, and it is necessary to prevent the powder from reuniting and avoid any oxidation and impurity during μMIM process. Further investigations in these areas will give rise to being explored of full potential of MIM technology.

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