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Dunand
David C. Dunand, Evanston, IL US
| Patent application number | Description | Published |
|---|---|---|
| 20090092817 | MAGNETIC MATERIAL WITH LARGE MAGNETIC-FIELD-INDUCED DEFORMATION - A magnetic materials construct and a method to produce the construct are disclosed. The construct exhibits large magnetic-field-induced deformation through the magnetic-field-induced motion of crystallographic interfaces. The construct is a porous, polycrystalline composite structure of nodes connected by struts wherein the struts may be monocrystalline or polycrystalline. If the struts are polycrystalline, they have a “bamboo” microstructure wherein the grain boundaries traverse the entire width of the strut. The material from which the construct is made is preferably a magnetic shape memory alloy, including polycrystalline Ni—Mn—Ga. The construct is preferably an open-pore foam. The foam is preferably produced with a space-holder technique. Space holders may be dissolvable ceramics and salts including NaAlO | 04-09-2009 |
| 20100150767 | Method of making metallic foams and foams produced - A method of making a metallic foam by a sintering process that includes solid state sintering and transient liquid phase sintering to form and then densify the metallic foam structure. A metallic foam is provided having a sintered foam skeleton structure with desirable macro-pores throughout wherein the undesirable micropores in walls of the skeleton structure are filled by a eutectic phase without closing off the desirable macro-pores. | 06-17-2010 |
| 20110064965 | POLYCRYSTALLINE FOAMS EXHIBITING GIANT MAGNETIC-FIELD-INDUCED DEFORMATION AND METHODS OF MAKING AND USING SAME - Magnetic materials and methods exhibit large magnetic-field-induced deformation/strain (MFIS) through the magnetic-field-induced motion of crystallographic interfaces. The preferred materials are porous, polycrystalline composite structures of nodes connected by struts wherein the struts may be monocrystalline or polycrystalline. The materials are preferably made from magnetic shape memory alloy, including polycrystalline Ni—Mn—Ga, formed into an open-pore foam, for example, by space-holder technique. Removal of constraints that interfere with MFIS has been accomplished by introducing pores with sizes similar to grains, resulting in MFIS values of 0.12% in polycrystalline Ni—Mn—Ga foams, close to the best commercial magnetostrictive materials. Further removal of constraints has been accomplished by introducing pores smaller than the grain size, dramatically increasing MFIS to 2.0-8.7%. These strains, which remain stable over >200,000 cycles, are much larger than those of any polycrystalline, active material. | 03-17-2011 |
Jean-Pierre Dunand, Pau Cedex AU
| Patent application number | Description | Published |
|---|---|---|
| 20100232651 | Method of Processing Seismic Images of the Subsurface - The processing comprises an analysis of a seismic image to estimate seismic horizons in an area of the subsurface and the calculation of an accumulation value associated with each pixel of the seismic image by accumulation along a set of estimated seismic horizons to form a synthesized image composed of accumulation values. This synthesized image is transformed to obtain a seismic representation in which signed amplitudes are allocated to the pixels of the synthesized image. The transformation may comprise a combination with the original seismic image or else a convolution with a wavelet or another convolution kernel. | 09-16-2010 |
Nicolas Dunand, Saint Clar FR
| Patent application number | Description | Published |
|---|---|---|
| 20100223971 | MACHINE FOR BENDING A PROFILE IN TWO BENDING DIRECTIONS AND BENDING TOOL - The invention relates to a machine for bending a profile in two bending directions, that comprises a bending tool including at least two clamping forms ( | 09-09-2010 |