Abstract: A composite structure including a substrate and a heat protection element on the substrate, wherein the heat protection element includes a quasicrystalline aluminium alloy of one or a number of quasicrystalline phases which are either quasicrystalline phases in the strict sense, or approximating phases, wherein the quasicrystalline phases exhibit a thermal diffusivity, measured at ambient temperature, lower than 2.5×10−6 m2/s, and a thermal diffusivity measured in the temperature range 650-750° C.

Abstract: A composite structure including a substrate and a heat protection element on the substrate, wherein the heat protection element includes a quasicrystalline aluminum alloy of one or a number of quasicrystalline phases which are either quasicrystalline phases in the strict sense, or approximating phases, wherein the quasicrystalline phases exhibit a thermal diffusivity, measured at ambient temperature, lower than 2.5.times.10.sup.-6 m.sup.2 /s, and a thermal diffusivity measured in the temperature range 650.degree.-750.degree. C. which does not exceed the thermal diffusivity measured at ambient temperature by more than a factor of 3, and wherein the quasicrystalline aluminum alloy comprises Al.sub.a Pd.sub.b Mn.sub.c X.sub.d Y.sub.e T.sub.f I.sub.

Abstract: An element for thermally protecting a substrate is deposited on the substrate and comprises a quasicrystalline aluminium alloy having a thermal diffusivity lower than 2.5.times.10.sup.-6 m.sup.2 /s at room temperature and a thermal diffusivity, within the temperature range 650.degree.-750.degree. C., which does not exceed its thermal diffusivity at room temperature by a factor greater than 3. The element may be used to provide heat barriers or bonding layers for substrates. The heat protection element, used in the form of a heat barrier or in the form of a bond coat for heat barriers, exhibits good thermal insulation properties, good mechanical properties, a low specific mass, good resistance to corrosion, and great ease of processing. Further, the invention is useful in limiting heat transfer towards or from parts and components of fittings in many household and industrial devices, for example, heating or cooking devices, smoothing irons, automobile components, and in aeronautic components.

Abstract: An element for thermally protecting a substrate is deposited on the substrate and comprises a quasicrystalline aluminum alloy having a thermal diffusivity lower than 2.5.times.10.sup.-6 m.sup.2 /s at room temperature and a thermal diffusivity, within the temperature range 650.degree.-750.degree. C., which does not exceed its thermal diffusivity at room temperature by a factor greater than 3. The element may be used to provide heat barriers or bonding layers for substrates. The heat protection element, used in the form of a heat barrier or in the form of a bond coat for neat barriers, exhibits good thermal insulation properties, good mechanical properties, a low specific mass, good resistance to corrosion, and great ease of processing. Further, the invention is useful in limiting heat transfer towards or from parts and components of fittings in many household and industrial devices, for example, heating or cooking devices, smoothing irons, automobile components, and in aeronautic components.