Sökning: "Ni3Al"

Hittade 5 avhandlingar innehållade ordet Ni3Al.

  1. 1. Study of Ni3Al- and MoSi2-based Materials for High Temperature Structural Applications

    Författare :Karin Anne Xia Gong; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Intermetallic; Ni3Al; MoSi2;

    Sammanfattning : In general, the potential of current conventional high-temperature materials has been exploited to a large extent. The industries are therefore looking forward to development of alternative materials for their industrials application, which would be lighter, stronger and having improved higher temperature potential compared to the presently available alloys. LÄS MER

  3. 2. Oxidation of Fe- and Ni-aluminides in Dry and Humid Atmospheres

    Författare :Adeline Velon; RISE; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; aluminide; alloying element; SEM; high temperature oxidation; intermetallic; XPS; Fe3Al; Cr; water vapour; Ni3Al; AES;

    Sammanfattning : Aluminides based on Ni3Al and Fe3Al offer good mechanical and corrosion properties at high temperatures and are therefore being considered in the automotive and chemical industries. The aim of this work was to study the early stages and the mechanisms of oxide growth on unalloyed Ni3Al and Fe3Al in air. LÄS MER

  4. 3. A Ni3Al-alloy and its Composites as Potential Wear Resistant Materials for Advanced Applications

    Författare :Karin Anne Xia Gong; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Abrasive wear; Intermetallic matrix composite; Friction coefficient; Wear-resistant materials.; Nickel aluminide; Specific wear rate; Sliding wear;

    Sammanfattning : The Ni3Al-based intermetallic alloys as engineering materials in service, they may be subjected to a wear environment of some sort. Hence, it is technologically important to understand the tribological response and to determine methodologies to improve wear resistance of these advanced materials. LÄS MER

  5. 4. Aluminide Diffusion Coatings for Ni Based Superalloys. Coating and Oxide Microstructure

    Författare :Johan Angenete; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microstructure; aluminide diffusion coatings; nickel based superalloys; SEM; TEM; high temperature oxidation;

    Sammanfattning : This thesis reports on investigations of high temperature oxidation resistant aluminide diffusion coatings for Ni based superalloys. Such coatings basically consist of a .BETA.-NiAl layer at the surface of the . LÄS MER

  7. 5. Experimental Studies of Thermal Diffusivities concerning some Industrially Important Systems

    Författare :Riad Abdul Abas; Seshadri Seetharaman; Rainer Wunderlich; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; laser flash; thermal diffusivity; heat conduction; phonon; electron contribution; crystallisation degree; graphitisation; Metallurgical process engineering; Metallurgisk processteknik;

    Sammanfattning : The main objective of this industrially important work was to gain an increasing understanding of the properties of some industrially important materials such as CMSX-4 nickel base super alloy, 90Ti.6Al.4V alloy, 25Cr:6Ni stainless steel, 0. LÄS MER