Abstract: A test apparatus (1) is provided for examining sheet-like components (8), in particular membrane electrode assemblies for use in a fuel cell, at least in sections and preferably continuously, for perforations (7), which apparatus includes means (9) for applying a test gas (6) to one side of the sheet-like component, means (2) for emitting electromagnetic radiation (12) in a wavelength region adapted to the test gas (6), which means are arranged on that side (11) of the sheet-like component (8) which is remote from the test gas (6), and means (3, 4, 5) for detecting any electromagnetic radiation (12) which has been absorbed by the test gas (6) in a characteristic wavelength region, and a method for carrying out an examination of this type.

Abstract: A process for monitoring the spray stream during thermal spraying of spray material, which contains at least two different materials A and B, by means infrared thermography, wherein the thermographic measured values are divided into at least two regions of the radiation intensity and these are assigned or associated to the respective image data for the at least two materials A and B as well as processes for controlling a thermal spray process with spray material multiple materials, wherein the material distribution of at least two materials A and B and their material specific average temperatures and/or radiation intensities within the spray stream are employed as normed values for the spray parameter carrier gas flow through, burner or flame power and/or material dosing.

Abstract: A test apparatus (1) is provided for finding and locating defects in a workpiece (5, 6) The apparatus (1) has at least one heat source (2, 7, 13, 14), at least one sensor apparatus (3, 10, 11, 12) for determining the temperature distribution on at least one surface (8) of the workpiece (5,6), and an evaluation apparatus (4) connected to the sensor apparatus (3, 10, 11, 12) in which apparatus the workpiece (5, 6) and the test apparatus (1) are arranged such that they can move relative to one another in a direction (R) parallel to the surface (8) which has been exposed to the heat. The sensor apparatus (3, 10, 11, 12) extends at least along a line which is transverse with respect to the direction (R) of relative movement downstream of the heat source (2, 7, 13, 14) as seen in the direction (R) of relative movement, in order to measure the temperature distribution along at least this line. A test method for finding and locating a defect by means of a test apparatus of this type is also provided.

Abstract: A test apparatus (1) is provided for examining sheet-like components (8), in particular membrane electrode assemblies for use in a fuel cell, at least in sections and preferably continuously, for perforations (7), which apparatus includes means (9) for applying a test gas (6) to one side of the sheet-like component, means (2) for emitting electromagnetic radiation (12) in a wavelength region adapted to the test gas (6), which means are arranged on that side (11) of the sheet-like component (8) which is remote from the test gas (6), and means (3, 4, 5) for detecting any electromagnetic radiation (12) which has been absorbed by the test gas (6) in a characteristic wavelength region, and a method for carrying out an examination of this type.

Abstract: An arrangement for non-destructive detection and localization of short circuits in a membrane electrode arrangements (MEA), that includes the following components: a) a sample holder for holding and positioning an MEA; b) means for making electrical contact with an MEA so that an electrical voltage can be applied to the MEA; c) means for detection of position-resolved data via the thermal radiation from a body, which means can be arranged at a distance, which can be predetermined, from the sample holder and can make electronic contact with means for evaluation of the detected data. In addition a method for non-destructive detection and localization of short circuits in an MEA.

Abstract: The invention relates to a fuel cell consisting of one or more individual cells, wherein an individual cell is comprised of electrolyte-electrodes unit, means for gas distribution of reactants to the electrodes and an electric contacting of the individual cells. The inventive fuel cell has the following characteristics: the electrodes comprise electrically conductive, regularly disposed micro or nanoscale needle-shaped or tubular-shaped electrode elements affixed on a gas-permeable carrier substrate and coated with a catalyst; the electrode elements are fully or partially surrounded on the outside by the material of the electrolytes; the catalytic reaction zones in the electrode elements are connected to the means for gas distribution by the gas-permeable carrier substrate; the electrode elements are connected to one another and to the electric contacting of the individual cells in an electrically conductive manner.

Abstract: The present invention relates to a decorative plastic film for the surface treatment, in particular, of vehicle bodies and building facades. It has a micro- or nano-scale structure, in which micro-or nano-scale particles (4) are introduced in uniform shape, size, and orientation into a transparent polymer substrate (3), so that the optically perceptible effect is produced exclusively or largely by optical effects in the collective arrangement of the particles (4).