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Title: Fabrication of composite spray powders using reaction synthesis

Abstract

Intermetallic composite powders including up to 30 volume percent ceramic reinforcing phase have been fabricated without using binders by reaction synthesis. The mechanics of the process are discussed as related to the necessary reaction ignition condition. A detailed mechanism of the reaction and incorporation of the reinforcing phase is presented based on electron microscopy and thermodynamic calculations. The structure of NiAl-Al{sub 2}O{sub 3} composite powders and plasma sprayed coatings are reported. it is shown that uniform lamellar intermetallic composites with sub-micrometer features may be formed by spraying these powders using a single gun geometry. These materials may be useful in the formation of functionally gradient intermetallic-ceramic structures.

Authors:
;  [1];  [2]
  1. Xform, Inc., Cohoes, NY (United States)
  2. Niche Microstructural Corp., Troy, NY (United States)
Publication Date:
OSTI Identifier:
160494
Report Number(s):
CONF-940684-
ISBN 0-87170-509-5; TRN: IM9603%%76
Resource Type:
Conference
Resource Relation:
Conference: 1994 national thermal spray conference, Boston, MA (United States), 20-24 Jun 1994; Other Information: PBD: 1994; Related Information: Is Part Of 1994 Thermal spray industrial applications: Proceedings; Berndt, C.C.; Sampath, S. [eds.] [State Univ. of New York, Stony Brook, NY (United States). Dept. of Materials Science and Engineering]; PB: 816 p.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 40 CHEMISTRY; COMPOSITE MATERIALS; CHEMICAL PREPARATION; PLASMA ARC SPRAYING; MICROSTRUCTURE; ALUMINIUM OXIDES; NICKEL ALLOYS; ALUMINIUM ALLOYS; INTERMETALLIC COMPOUNDS; POWDERS; REACTION KINETICS; LIQUID METALS; PARTICLE SIZE; TEMPERATURE DEPENDENCE; HEAT TRANSFER; MILLING; ARGON; MORPHOLOGY; LAMELLAE; SCANNING ELECTRON MICROSCOPY

Citation Formats

Shaw, K G, McCoy, K P, and Trogolo, J A. Fabrication of composite spray powders using reaction synthesis. United States: N. p., 1994. Web.
Shaw, K G, McCoy, K P, & Trogolo, J A. Fabrication of composite spray powders using reaction synthesis. United States.
Shaw, K G, McCoy, K P, and Trogolo, J A. 1994. "Fabrication of composite spray powders using reaction synthesis". United States.
@article{osti_160494,
title = {Fabrication of composite spray powders using reaction synthesis},
author = {Shaw, K G and McCoy, K P and Trogolo, J A},
abstractNote = {Intermetallic composite powders including up to 30 volume percent ceramic reinforcing phase have been fabricated without using binders by reaction synthesis. The mechanics of the process are discussed as related to the necessary reaction ignition condition. A detailed mechanism of the reaction and incorporation of the reinforcing phase is presented based on electron microscopy and thermodynamic calculations. The structure of NiAl-Al{sub 2}O{sub 3} composite powders and plasma sprayed coatings are reported. it is shown that uniform lamellar intermetallic composites with sub-micrometer features may be formed by spraying these powders using a single gun geometry. These materials may be useful in the formation of functionally gradient intermetallic-ceramic structures.},
doi = {},
url = {https://www.osti.gov/biblio/160494}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Dec 31 00:00:00 EST 1994},
month = {Sat Dec 31 00:00:00 EST 1994}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

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