Abstract: A composite coating (1) resistant to wear is applied onto a substrate (2) and contains a mixture of hard material particles (3) and particles (5) of a solid lubricant (6). The particles (3, 5) are incorporated in a binder alloy (4). The lubricant particles are each enclosed by a protective envelope (7). The protective envelope substantially prevents bonding between components of the lubricant (6) on the one hand and components of the binder alloy (4) as well as of the hard material particles (3) on the other hand.

Abstract: A high temperature fuel cell has a planar substantially centrally symmetrical structure. It includes an electrochemically active plate and an interconnector formed as an air heat exchanger. The air infeed positions are arranged at the periphery of the cell. The interconnector is built up in three layers: the middle layer consists of a plate which has at least approximately the same thermal expansion as the electrochemically active plate, and the side layers are formed of metal sheets which are substantially thinner than the plate of the middle layer. The metal sheets have a relief-like structure and are firmly connected to the middle plate via a plurality of contact positions. The metal side sheets are designed for a direct contact with the electrochemically active plate and the corresponding plate of a neighboring cell.

Abstract: A parting compound in the form of a monolithic component (3a, 3b) is used in accordance with the invention for the hot forming of encased metal parts (2). This component consists of powder particles strengthened by sintering. The parting compound material is brittle at ambient temperature and at the deforming temperature of the metal parts is plastically deformable or free flowing in a highly viscous manner.

Abstract: The fuel cell battery (10), comprising stacked modules (1) and using air and gaseous fuel as reactants, is arranged substantially axially symmetrically. A module comprises the following components: a three-layer, electrochemically active plate (2) which is free from holes and is composed of a solid electrolyte (20) conducting oxide ions as well as a gas and an air electrode (21 and 22); and a plate-shaped, metallic heat exchange element (5) for heating the reactants. According to the invention a porous layer (3) provides connection between the gas electrode (21) and the heat exchange element (5), the porous layer being electrically conductive and acting to equalize thermal stresses; this layer (3) forming further together with the electrochemically active plate (2) an integrated unit.

Abstract: The method makes possible the production of iron aluminide raw materials which consist of a Fe.sub.3 Al-base alloy containing 18-35% Al, 3-15% Cr, 0.2-0.5% B and/or C, and altogether 0-8% of the following alloying additives: Mo, Nb, Zr, Y and/or V, as well as iron as dominant remainder. In accordance with the invention additives are added to the melt of a known alloy, from which dispersed crystallites, dispersoids, are formed which thanks to good wettability become upon solidification, embedded in the monocrystalline phase. From the solid alloy, through hot rolling at a temperature between 650.degree. and 1000.degree. C., a fine grain structure may be generated.