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Sunday, July 12, 2020 | History

3 edition of Plasma-sprayed self-lubricating coatings found in the catalog.

Plasma-sprayed self-lubricating coatings

H. H Nakamura

Plasma-sprayed self-lubricating coatings

by H. H Nakamura

  • 353 Want to read
  • 23 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in Washington, D.C, [Springfield, Va .
Written in English

    Subjects:
  • Plasma spraying,
  • Coatings -- Thermal properties

  • Edition Notes

    StatementH.H. Nakamura, W.R. Logan, and Y. Harada ; prepared for Lewis Research Center under contract NAS3-21979
    SeriesNASA contractor report -- 3680
    ContributionsLogan, W. R, Harada, Y, Lewis Research Center, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
    The Physical Object
    Paginationiv, 119 p. :
    Number of Pages119
    ID Numbers
    Open LibraryOL17978703M

    High Velocity Oxyfuel Deposition for Low Surface Roughness PS Self-Lubricating Composite Coatings Fig. 1—Backscattered electron images of PS coatings (cross section); (a) plasma-sprayed with large particles, (b) plasma-sprayed with small particles. There is an ongoing need for developing high temperature self-lubricating materials to meet the severe conditions of mechanical systems, such as advanced engines which require increasingly high working temperatures (at °C or above) and long life [].However, achieving and maintaining low friction and wear at high temperatures have been very difficult in the past and still are the Cited by: 7.

    "Program for Plasma-Sprayed Self-Lubricating (11) Howard, S. A. (). "Rotordynamics and Design Methods of an Oil-Free Coatings" NASA CR Introduction To Ceramics.   An atmospheric plasma spraying (APS) system was used to deposit promising WC-(W,Cr) 2 C-Ni/Ag/BaF 2 -CaF 2 self-lubricating composite coatings. The friction and wear behavior of the composite coatings sliding against Si 3 N 4 ball was investigated from room temperature to ° by:

    Inspired by the structure of cancellous bone and the nutrition metabolism of articular cartilage, we present a novel concept for a synthetic articular-cartilage-like material. The bioinspired material possesses a low coefficient of friction even under ultrahigh loads and has an extremely long lifetime. Furthermore, the composite shows zero-wear behavior and causes negligible wear damage to the Cited by: Get this from a library! Plasma-sprayed coatings for lubrication of a titanium alloy in air at ° C. [Harold E Sliney; Donald W Wisander; United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.].


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Plasma-sprayed self-lubricating coatings by H. H Nakamura Download PDF EPUB FB2

Plasma-sprayed self-lubricating coatings. Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.: For sale by the National Technical Information Service], (OCoLC) Material Type: Government publication, National government publication: Document Type: Book.

Program for plasma-sprayed self-lubricating coatings. Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.: For sale by the National Technical Information Service], (OCoLC) Material Type: Government publication, National government publication: Document.

Microplasma Sprayed Hydroxyapatite Coatings: Medicine & Health Science Books @ ed by: 6. The self-lubricating composite layer was plasma-sprayed on the bearing bore and one thrust surface. The coatings were machined to a thickness of centimeter ( in.), then sanded to remove machining marks.

All bearing elements (except the self-lubricating layer in the bore) were made of R a precipitation hardening nickel alloy. Self-lubricating plasma- sprayed coatings were in- Titanium-5 Al 5 Sn alloy pins were slid Plasma- sprayed, pure silver coatings were effective in providing low pin wear.

Coatings The addition of calcium fluoride was It has the following nominal composition by weight: INTRODUCTIONFile Size: KB. This book presents the principles of plasma and heat spraying.

It introduces plasma jet and the formation of plasma sprayed coatings. It explains the adhesion process and also presents standard methods for measurement according to DIN forms.

Some case studies are presented for illustration. Consequently, a method of reducing cost and increasing rail life is of significance to the railroad industry.

Through the use of self-lubricating materials and thermal spray technology a composite surface coating was developed. A steel coating provided a wear-resistant matrix, in Cited by: 4. Plasma-sprayed self-lubricating coatings. By Y. Harada, W. Logan and H. Nakamura. Abstract. One of the most important criterion for acceptable commercial application of a multiple phase composition is uniformity and reproducibility.

This means that the performance characteristics of the coat - e.g., its lubricating properties, bond Author: Y. Harada, W. Logan and H. Nakamura. Plasma sprayed coatings are used as erosion or abrasion resistant coatings in a wide variety of applications.

Extensive research shows that the deposition parameters like energy input in the. Abradable coatings in compressor and high-pressure stages of gas turbines must provide specific hardness and porosity values to achieve an optimal cut-in of the blade tips.

A fractional factorial experimental plan was designed to investigate the influence of the plasma spraying parameters argon flow rate, current, spraying distance and powder feed rate on these properties of magnesia by: Plasma-sprayed self-lubricating coatings were investigated for possible use to ° C in Space Shuttle airframe bearings or other high-temperature applications such as automotive turbine regenerator seals.

Composite coatings with good oxidation re-sistance as well as self-lubricating characteristics to ° C were developed. TheCited by: 2. Thin Solid Films, 64 () Elsevier Sequoia S.A., Lausanne-Printed in the Netherlands WIDE TEMPERATURE SPECTRUM SELF-LUBRICATING COATINGS PREPARED BY PLASMA SPRAYING HAROLD E.

SLINEY National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio (U.S.A.) (Received Apaccepted Ap ) Self-lubricating, multicomponent coatings Cited by: Plasma Sprayed Self-Lubricating Cr2O3-CaF2 Coatings: Friction and Wear Properties May Conference: 15th International Thermal Spray Conference '98, MayNice.

The book explains also the physics of thermal spraying and the phenomena as acceleration or heating the solid particles in the problems related to the coatings buildup,that starts with. Characterization methods and the properties of the applied coatings are presented, and the book concludes with a lengthy chapters on thermal spray applications covers such areas as the aeronautics and space, automobiles, ceramics, chemicals, civil engineering, decorative coatings, electronics, energy generation and transport, iron and steel.

maximum torque conditions. The new liner and ring coatings, however, had 15% lower wear rates. The new Surfaces Research self-lubricating cylinder coating achieved 50% reduction in cylinder liner and top piston ring wear rates in actual high-temperature engine, compared to either cast iron or a wear-resistant chromium oxide coating.

ACKNOWLEDGMENTS. The papers explore technological advances in thermal spraying and the related field of surfacing by welding. This book is comprised of 97 chapters divided into 16 sections and begins with a discussion on the applications of thermal spraying in the power generation industry, with emphasis on the use of thermal coatings to protect boilers against Book Edition: 1.

Li found that plasma sprayed nanostructured YSZ coating showed an improved wear resistance because of the decreased size of pores and interlamellar cracks inside the coatings.

Suspension plasma spraying (SPS) is a commonly technique used to manufacture finely structured YSZ coatings where nanometric or sub-micrometric particles are dispersed in Cited by: 4.

After vacuum impregnation and hydrothermal reaction, numbers of MoS 2 powders, look like flowers, generate inside the plasma sprayed YSZ coating. Moreover, the growing point of the MoS 2 flower is the intrinsic micro-pores of YSZ coating. The friction and wear tests under high vacuum environment indicate that the composite coating has an Cited by: 2.

Sliney and DellaCorte, developed a series of plasma-sprayed self-lubricating coatings (PS, PS and PS) with a working temperature from room temperature to °C. The PS series of coatings contained four kinds of components: Ni-based alloy acted as a binder, Cr 2 O 3 or Cr 3 Cr 2 acted as a hardening phase, Ag acted as a low temperature lubricant and BaF 2 /CaF 2 eutectic acted Cited by:.

Friction and wear characteristics of atmospheric plasma sprayed Ni-Al–Ag–MoS 2, Ni-Al-Ag-MoS wt% hBN and Ni-Al-Ag-MoS wt% hBN coatings were examined against alumina ball at a constant load of 5 N and sliding velocity of m/s from room temperature (RT) to °C using a high temperature hardness of coatings was found to decrease from HV to HV with Cited by: 4.An alternative production route to obtain thermally sprayed self-lubricating ceramic coatings is proposed and microstructural, friction and wear properties of these coatings are : Lech Pawlowski.Microplasma Sprayed Hydroxyapatite Coatings discusses plasma spraying and other related HAp coating techniques, focusing on the pros and cons of macroplasma sprayed (MAPS)- and microplasma sprayed (MIPS)-HAp coatings.

The book begins by explaining what a biomaterial really is, what the frequently used term biocompatibility stands for, and why.