Gm Global Technolgoy Operations, Inc.

Yang T Cheng

Michael J Lukitsch

Xingcheng Xiao

Tao Xie

Leonid Charles Lev

John C Ulicny

Mark William Verbrugge

Paul Edward Krajewski

Jon T Carter

Stephen Joel Harris

Adam T Timmons

Anita Miriam Weiner

Daniel E Rodak

Carolina C Ang

Alan L Browne

Mei Cai

Nilesh D Mankame

Hamid Ghavami Kia

Youssef Morcos Mikhail

Michael P Balogh

Gayatri Vyas

William R Rodgers

Mark A Golden

John Robert Bradley

Jihui Yang

Martin S Ruthkosky

Fanghui Shi

Swathy Swathirajan

David S Grummon

Paula Diane Fasulo

Robert F Paluch

Neil E Anderson

Yijun Zhang

A polymer material system that consists of multiple SMP layers of different shape memory transition temperatures in a multilayer construction to achieve and tailor a multiple shape memory effect. Wherein two SMP layers of different shape memory transition temperatures are utilized, a triple shape memory effect is achieved.

Polymer systems with multiple shape memory effect

An exemplary embodiment discloses a polymer system including a shape memory polymer material and a graphene material.

Self-healing and scratch resistant shape memory polymer system

One embodiment includes a lithium-ion battery negative electrode including one or more low-melting point alloys that react with lithium.

Self healing lithium-ion battery negative electrodes, product including same, and methods of making and using same

One embodiment includes a liquid-metal alloy negative electrode for a lithium-ion battery. The electrode may also include a porous matrix that comprises a polymer matrix material, a hydrogel material, or a ceramic material.

Liquid-metal negative electrode for lithium-ion batteries

A method for embedding a hydrophilic and electrically conductive layer into a flow field plate or bipolar plate for a fuel cell. In one embodiment, the layer is niobium doped titanium oxide in a powder form. The method includes mixing the powder material in a suitable solution, such as a solvent. The solution is deposited on a substrate, such as a stainless steel substrate, by any suitable process, such as brushing. The substrate is then heated so that the solvent evaporates to leave a coating of the powder material. The substrate is then positioned in a die press and is stamped to the shape of the bipolar plate, where the stamping operation embeds the powder material into an outer surface of the bipolar plate.

Method for making super-hydrophilic and electrically conducting surfaces for fuel cell bipolar plates

A method for forming an aperture includes stamping an aperture into the article using a pellet, and refining aperture shape(s) and/or aperture dimensions. Methods for forming articles having reduced residual compressive stress are also disclosed. Very generally, the methods include establishing a diamond coating on at least a portion of a substrate, and applying a stress-relief process to the diamond coating, the substrate, or combinations thereof.

Methods for forming articles having apertures and articles having substantially reduced residual compressive stress

Electromagnetic forming methods suitable for creating surface features on a shape memory alloy are described. Features may be created over a range of scales, including those suitable for the generation of holographic images. Features, images, or patterns may be made capable of reversibly appearing and disappearing as a result of changes in temperature and may include temperature sensitive displays for automotive and other applications.

Embossed shape memory sheet metal article

A layered coating is disclosed herein. The layered coating includes a chromium layer, an intermediate layer of chromium and nitrogen established on the chromium layer, and an outer layer of chromium and nitrogen established on the intermediate layer. The intermediate layer has a gradually changing composition, wherein the chromium concentration decreases from an area of the intermediate layer adjacent the chromium layer towards a surface of the layered coating.

Layered coating and method for forming the same

An apparatus is provided having an active material forming a surface thereof in contact with a rheological fluid. The active material is controllable to vary a surface geometry thereof between a rough or nonsmooth surface geometry to increase drag, and achieve an increase in stress transmitted through the fluid, when a field is applied, while allowing a smooth surface geometry and an associated reduction in stress transmitted through the fluid when the field is removed. A method of enhancing performance of an apparatus that includes a rheological fluid is also provided.

Apparatus with active material surface in contact with rheological fluid and method of enhancing performance thereof

A thermo-reversible dry adhesive, having shape memory polymer characteristics, introduces one or more particles of micro- or nano-particles to at least one layer of the at least one layer of shape memory polymer. These particles may be remotely activated to induct heat sufficient to transform the dry adhesive material from its temporary shape to its permanent shape in the absence of load, which allows the dry adhesive to be reversibly coupled to one or more substrates, wherein the degree of adhesion is greater when the dry adhesive is in the temporary shape than in the permanent shape.

Remote activation of thermo-reversible dry adhesives

A composite electrolyte membrane for a fuel cell is disclosed. The membrane is formed of a polymer having layers of a clay-based cation exchange material. The substrate comprises an electrode formed from a solution that has an exfoliated, inorganic, sodium-based cation exchange material, an ionically conductive polymer-based material, and a solvent-dispersant.

Fuel cell assembly

An internal combustion engine is provided having a cylinder case with at least one cylinder bore wall defining at least one cylinder bore. At least one piston is reciprocally movable within the at least one cylinder bore. The at least one piston includes at least one skirt portion preferably having a barrel-shaped profile. The cylinder bore wall has an oleophobic characteristic, while the at least one skirt portion has an oleophilic characteristic. The oleophobic and oleophilic characteristic is produced by at least one of coating and machining the at least one cylinder bore wall and the at least one skirt portion, respectively.

Piston skirt oil retention for an internal combustion engine

The hot stretch forming of sheet metal alloys, such as highly deformable aluminum alloy materials, is improved by using a lubricant comprising bismuth between the forming tool and the engaged surface of the sheet metal. A precursor of bismuth, such as bismuth subsalicylate, may be dispersed in a liquid and applied to the sheet metal before the sheet is heated to its forming temperature. Other lubricants such as boron nitride may be combined with the bismuth precursor. The precursor compound is decomposed to bismuth (or bismuth and carbon in the case of bismuth subsalicylate) which lubricates contact between the surface(s) of the sheet and the forming tool during forming and removal of the formed part from the tool.

Growing community of inventors

Troy, MI, United States of America

Yang T Cheng