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BALORA PVD MCrAlYThe next generation of high-density MCrAlY coatings using PVD Arc technology

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Turbine Hot Section
Gas Turbine hot section

In order to improve the efficiency level of gas turbines, the operating temperatures are often increased to 1,200 °C and above. The coatings used in the hot section must withstand these extreme conditions to prevent hot corrosion and component oxidation, otherwise a system failure would occur – resulting in considerable replacement costs.

Typically, MCrAlY coatings are produced using thermal spraying and other technologies. Oerlikon Balzers has applied its proven high-end PVD Arc technology to make the standard MCrAlY coating production process more efficient and significantly improve the coating properties.

BALORA™ PVD MCrAlY offers superior properties compared to conventionally produced MCrAlY coatings: it has excellent substrate adhesion, and it can be applied up to a thickness of 100 micrometres without porosity. Most importantly, the MCrAlY composition in combination with the high density can be tailored to form the perfect barrier against oxidation on turbine blades and vanes.

  • Výhody

    Výhody

    Features

    Advantages

     

    Customer value

    Oxidation resistance

    Higher service temperatures

     

    Improved efficiency

    High density

    Excellent diffusion barrier, better control over diffusion processes

     

    Improved reliability of the turbine blades

    Low surface roughness

    Aerodynamically smooth surfaces at high temperatures

     

    Increased efficiency of turbine blades in power generation and aerospace

    Outstanding substrate adhesion

    Excellent atomic bonding adhesion on all turbine materials

     

    Durability and performance from protective coating

    Improved corrosion resistance

    The optimum coating composition combined with PVD technology prevents premature hot corrosion at high operating temperatures

     

    Extended turbine blade service life, reduced maintenance and longer service intervals

  • Specifikace

    Specifikace

    BALORA PVD MCrAlY
    Povlakový materiál NiCrAlY (Ni, Ni/Co, Co)
    Struktura povlaku Arc
    Barva povlaku grey
    Tvrdost povlaku HIT[GPa]* 7 - 11
    Max. provozní teplota [°C]**** 1200
    Teplota povlakování [°C] 400 - 500
    Typická tloušťka povlaku [µm] 0.1 to > 100
    Všeobecná poznámka Všechny uvedené údaje představují přibližné hodnoty; závisí na aplikaci, okolním prostředí a zkušebních podmínkách
    *Tvrdost povlaku HIT[GPa] Měřeno nanoindentací podle ISO 14577. V případě vícevrstvých povlaků se tvrdost jednotlivých vrstev liší.
    ****Max. provozní teplota [°C] Jedná se o přibližné hodnoty mimo oblast. V důsledku zákonů termodynamiky existuje v aplikaci závislost na tlaku.
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