Application of artificial intelligence control to the vapor-liquid-solid silicon carbide whisker process

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Silicon carbide whiskers have excellent mechanical and chemical properties, making them very desirable as a reinforcement for structural ceramic and other composite materials. Los Alamos has developed a laboratory-scale batch process for producing very high quality SiC whiskers by the vapor-liquid-solid (VLS) method which is an active candidate for technology transfer involving significant scale-up. The process, however, involves quite complex chemical/physical and parametric relationships and has not as yet lent itself successfully to modeling. An expert computer system was therefore developed to facilitate the transfer of this technology to industry. Optimum conditions were determined by relating the many process parameters ... continued below

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Pages: (13 p)

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Shalek, P.D. & Parkinson, W.J. January 1, 1989.

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Silicon carbide whiskers have excellent mechanical and chemical properties, making them very desirable as a reinforcement for structural ceramic and other composite materials. Los Alamos has developed a laboratory-scale batch process for producing very high quality SiC whiskers by the vapor-liquid-solid (VLS) method which is an active candidate for technology transfer involving significant scale-up. The process, however, involves quite complex chemical/physical and parametric relationships and has not as yet lent itself successfully to modeling. An expert computer system was therefore developed to facilitate the transfer of this technology to industry. Optimum conditions were determined by relating the many process parameters to product results to establish a set of rules for running the process. These are incorporated in a two-phase expert system designed to guide inexperienced users. In Phase 1, an expert consultant program provides the user with information that enables him to set up the run. This information is incorporated into the rule base that makes up Phase 2 --- the control system. At present, the operator functions as the controller by responding to the decisions of the expert system; automation can be added later. 13 refs., 16 figs.

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Pages: (13 p)

Notes

NTIS, PC A03/MF A01 - OSTI; GPO Dep.

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  • Materials Research Society fall meeting, Boston, MA (USA), 27 Nov - 2 Dec 1989

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  • Other: DE90007835
  • Report No.: LA-UR-90-33
  • Report No.: CONF-891119--93
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5058537
  • Archival Resource Key: ark:/67531/metadc1056386

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Office of Scientific & Technical Information Technical Reports

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Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1989

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  • Jan. 22, 2018, 7:23 a.m.

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  • April 26, 2018, 2:41 p.m.

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Shalek, P.D. & Parkinson, W.J. Application of artificial intelligence control to the vapor-liquid-solid silicon carbide whisker process, article, January 1, 1989; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1056386/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.