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Saturday, August 1, 2020 | History

3 edition of Processing of laser formed SiC powder found in the catalog.

Processing of laser formed SiC powder

Processing of laser formed SiC powder

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  • 10 Currently reading

Published by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Cleveland, Ohio], [Springfield, Va .
Written in English

    Subjects:
  • Ceramic powders.,
  • Lasers.

  • Edition Notes

    StatementJ.S. Haggerty and H.K. Bowen ; prepared for Lewis Research Center under grant NAG 3-312.
    SeriesNASA contractor report -- 179638., NASA contractor report -- NASA CR-179638.
    ContributionsBowen, H. Kent., Lewis Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15391603M

    For example, special processing heads for laser materials processing are being developed and produced, based on a customer's specific needs. In addition, process optimization by changing the design of components as well as systems to monitor quality on-line count . Laser absorption by powder bed in selective laser sintering (SLS) processes remains a critical issue to be fully understood. This issue is important for the appropriate selection of processing parameters in practices as well as accurate definition of thermal input an the in numerical Size: KB.

    Most ceramic fabrication processes begin with finely ground powder. Chapter. 5. describes the criteria for selection of the starting powder, meth- ods of achieving the proper particle size distribution, and requirement8 for pretreating the powder before it can be formed into the desired wm- ponent. Chapter. 6. PROCEEDINGS VOLUME High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications Multi-kW laser cladding using cylindrical collimators and square-formed fibers Author(s): Controlling the thermally induced focal shift in laser processing heads.

    The feedstock material was prepared by mechanically mixing SiC or B4C powder with silicon (Si) powder in a volume ratio. The resulting powder blends were then laser sintered. The Si in the powder mix melted and re-solidified, binding the carbide particles together and yielding porous Si-SiC or . The application of beam technologies to produce new materials and components, other than microelectronics, is not a new development. This chapter reviews the function of beams in the development of coatings and surface modification and the formation of net shapes, composites, nanophases, and optical surfaces, including treatment of polymeric substrates.


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Processing of laser formed SiC powder Download PDF EPUB FB2

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

Get this from a library. Processing of laser formed SiC powder: final report, NAG, J - Dec. 31, [J S Haggerty; H Kent Bowen; United States. Novel Materials Processing by Advanced Electromagnetic Energy Sources mainly laser and microwave processing of solids.

Examples of simultaneous use of different high frequency sources are given for powder synthesis and for microstructure control upon sintering of ceramics. Millimeter-wave dielectric measurement of α-SiC powder was.

The properties and processing parameters of the metal matrix composite (MMC) surface layers, obtained under conditions of the superposition of intense Cited by: The present contribution provides an overview of the application of high power laser only for material processing in engineering applications, and intentionally excludes the scope of application.

Laser Material Processing (4th Edition) will be of use as university or industrial course material for senior undergraduate, graduate and non-degree technical training in optoelectronics, laser processing and advanced manufacturing.

Practising engineers and technicians in these areas will also find the book an authoritative source of /5(5). CRP Technology intros cutting-edge composite material for laser sintering. Market pressures dampen results. Additive Manufacturing.

Knust-Godwin buys Velo3D metal additive manufacturing machine. Industrial Laser Solutions Editors. EDITORIAL GUIDE: Automotive manufacturing benefits from. Processing of materials by ultrashort laser pulses has evolved significantly over the last decade and is starting to reveal its scientific, technological and industrial potential.

In ultrafast Cited by: "Laser Material Processing is a clear and instructive textbook for students who will become the next generation of laser specialists, and it is a good source of updated knowledge for practicing engineers and technicians in optoelectronics, laser processing, materials treatment, and advanced manufacturing.

The book also will be helpful as a. Powder, Powder Mixture, Additive Manufacturing. Abstract. Laser-based powder bed additive manufacturing (AM) of metal powders uses pre-alloyed powder, which limits the alloys available for processing. Other processes using metal powders such as powder metallurgy (PM) (press and sinter and MIM (Metal Injection Molding)) andFile Size: KB.

Powder Processing 1. Introduction Powder routes are used to make 3D components from metals, ceramics and some polymers. Mechanical properties can be excellent, and the process can be cost effective: it is a near-net shape process so material wastage is small, and energy requirements can be modest.

PM (powderFile Size: KB. Selective Laser Sintering of SiC/Polyamide Composites. Laser processing has many advantages such as high clusters of nanometer-sized SiC grains formed and the silicon phase transformed. Lasers now play a major part in the processing of the disparate materials used in engineering and manufacturing.

The range of procedures in which they are involved is ever increasing. With this growing prominence comes a need for clear and instructive textbooks to teach the next generation of laser users.

The informal style of Laser Material Processing (3rd Edition) will guide you smoothly /5(2). Reflection-type diffractive optical element employing SiC and Si for application to high power laser material processing Paper Time: PM - PM Author(s): Sohan Kawamura, Shin Toyota, Oka Soichi, Nippon Telegraph and Telephone Corp.

(Japan). Additively Manufactured Spaceflight Hardware by Laser Powder Bed Fusion in Metals” (henceforth, MSFC-STD) and implements the requirements for qualification of the laser powder bed fusion (L-PBF) metallurgical process, control of L-PBF equipment File Size: 1MB.

• Laser Line Scan • Global Thermal. View process at point of fusion; collect information at and surrounding the melt pool.

FOV is the powder bed. Collect information before, during, and after a File Size: 3MB. laser to selectively harden a photosensitive epoxy polymer in a bath to form a part. SLM builds up a part from polymer or metal powder by using a sealed off CO2 laser such as a Diamond C-Series laser or a 1 μm fiber laser.

as full body cut, laser scribing, ablation and non-thermal processes such as filamentation. The book contains a great deal of basic as well as advanced information and covers a broad range of pertinent topics: materials, instruments, procedures, industrial and laboratory equipment, monitoring, processes, processing systems, processing results and prototyping.

The book should not be missed in laboratories dealing with laser 3/5(1). LPF Laser Powder Forming rapid prototyping services uses a high power laser to melt metallic powder into a pool along the build surface. A computer controlled system traces the cross-sectional layer of the object’s shape.

As the molten pool forms, metallic powder is injected into the pool where the combination cools and hardens to form a layer.

Silicon carbide (SiC), also known as carborundum / k ɑːr b ə ˈ r ʌ n d əm /, is a semiconductor containing silicon and occurs in nature as the extremely rare mineral tic SiC powder has been mass-produced since for use as an of silicon carbide can be bonded together by sintering to form very hard ceramics that are widely used in applications Chemical formula: CSi.

Powders of pure aluminum (Al) with 55 and 75 vol.% SiC particles were ball milled in a conventional rotating ball mill with stainless steel and ZrO2 balls for 1–10 h.

The morphology and microstructure of the milled powders have been observed and analyzed by scanning electron microscopy (SEM) and energy dispersive x-ray (EDX).

The milled powders were plasma sprayed onto a graphite Cited by:   A successful combination of parameters of Nd:YAG laser beam, powder stream and the temperature of Al substrate have been found to form reinforced MMC layer in a single injected laser track, containing 25‐30 % volume fraction of SiC : V.

Ocelik, J.A. Vreeling, Y.T. Pei, J.T.M. de Hosson.Mridha, S. and Baker, T. N. (), ‘ Metal matrix composite layers formed by laser processing of commercial purity Ti-SiC p in a nitrogen environment ’, Materials Science & Technol – Author: P. A. Dearnley.