Saint-gobain Ceramics & Plastics, Inc.

Saint-gobain Abrasives, Inc.

Saint-gobain Abrasifs

Saint-gobain Centre De Recherches Et D'etudes Europeen

Saint-gobain Surface Solutions France

Guangyong Lin

Yeshwanth Narendar

Nilanjan Sarangi

Aravind Mohanram

Samuel Marlin

Oh-Hun Kwon

Stephen E Fox

Sandhya Jayaraman Rukmani

Christopher J Reilly

Brian C LaCourse

Amandine Martin

John D Pietras

Caroline Levy

Peter Janeczek

Qing Wang

Hansong Huang

Lu Lu

Daming Zhang

Alexander Nashed

Wesley R Robbins

Qiang Zhao

Robert J Sliwoski

Simone Schaefer

Arthur Turkin

Zhenyu Luo

Daniel René Urffer

The subject application relates to bonded abrasive with low wetting bond material. An abrasive article including a bonded abrasive body having a particular MOR/EMOD ratio associated with a particular bond vol %. The body also can include a) an average Bond Post Area (BPA) of not greater than microns; b) an average Bond Post Count (BPC) of at least 140 per 1536 mm; c) an average bond wetting radius of at least 30/microns; or d) a combination of a) and b).

Bonded abrasive with low wetting bond material

An abrasive article can include a body including a first portion coupled to a second portion in a radial plane. The body can include a central opening extending in an axial direction of the body through the first portion and through the second portion. The central opening can include a circumferential surface defining an inner diameter of the body. The circumferential surface can be defined by at least a portion of the first portion and at least a portion of the second portion. The first portion can include first abrasive particles contained within a first bond material, including an inorganic material, and the second portion can include second abrasive particles contained within a second bond material, including an organic material. The organic material can include epoxy. In an embodiment, the second portion comprises an elongation-at-fracture of less than 2.7%, a Stiffness Value of at least 8.3, or a combination thereof.

Abrasive articles and methods for forming same

An abrasive article includes a body having a bond material extending throughout the body and abrasive particles contained in the bond material. The bond material can include aluminum oxide (AlO) and lithium oxide (LiO). In an embodiment, the bond material can include a ratio (AlO/LiO) of a content of aluminum oxide (AlO) relative to a content of lithium oxide (LiO), based on weight percent, of greater than 11.5 and at most 20. In another embodiment, the abrasive article can have a versatility factor of greater than 1.90.

Bonded abrasive articles

A sintered ceramic component can have a final composition including at least 50 wt. % MgO and at least one desired dopant, wherein each dopant of the at least one desired dopant has a desired dopant content of at least 0.1 wt. %. All impurities (not including the desired dopant(s)) are present at a combined impurity content of less than 0.7 wt. %. A remainder can include AlO. The selection of dopants can allow for better control over the visual appearance of the sintered ceramic component, reduces the presence of undesired impurities that may adversely affect another part of an apparatus, or both. The addition of the dopant(s) can help to improve the sintering characteristics and density as compared to a sintered ceramic component that includes the material with no dopant and a relatively low impurity content.

Sintered ceramic component and a process of forming the same

A fuel cell comprises a plurality of sub-cells, each sub-cell including a first electrode in fluid communication with a source of oxygen gas, a second electrode in fluid communication with a source of a fuel gas, and a solid electrolyte between the first electrode and the second electrode. The sub-cells are connected with each other with an interconnect. The interconnect includes a first layer in contact with the first electrode of each cell, and a second layer in contact with the second electrode of each cell. The first layer includes a (La,Mn)Sr-titanate based perovskite represented by the empirical formula of LaSrTiMnO. In one embodiment, the second layer includes a (Nb,Y)Sr-titanate perovskite represented by the empirical formula of SrYNbTiO. In another embodiment, the interconnect has a thickness of between about 10 &#x3bc;m and about 100 &#x3bc;m, and the second layer of the interconnect includes a (La)Sr-titanate based perovskite represented by the empirical formula of SrLaTiO.

Ceramic interconnect for fuel cell stacks

An interconnect of a solid oxide fuel cell article is disclosed. The interconnect is disposed between a first electrode and a second electrode of the solid oxide fuel cell article. The interconnect comprises a first phase including a ceramic interconnect material and a second phase including partially stabilized zirconia. The partially stabilized zirconia may be in a range of between about 0.1 vol % and about 70 vol % of the total volume of the interconnect.

Solid oxide fuel cell interconnects including a ceramic interconnect material and partially stabilized zirconia

An interconnect material is formed by combining a lanthanum-doped strontium titanate with an aliovalent transition metal to form a precursor composition and sintering the precursor composition to form the interconnect material. The aliovalent transition metal can be an electron-acceptor dopant, such as manganese, cobalt, nickel or iron, or the aliovalent transition metal can be an electron-donor dopant, such as niobium or tungsten. A solid oxide fuel cell, or a strontium titanate varistor, or a strontium titanate capacitor can include the interconnect material that includes a lanthanum-doped strontium titanate that is further doped with an aliovalent transition metal.

Highly sinterable lanthanum strontium titanate interconnects through doping

A bonding layer, disposed between an interconnect layer and an electrode layer of a solid oxide fuel cell article, may be formed from a yttria stabilized zirconia (YSZ) powder having a monomodal particle size distribution (PSD) with a dthat is greater than about 1 &#x3bc;m and a dthat is greater than about 2 &#x3bc;m.

Solid oxide fuel cell interconnect cells

A solid oxide fuel cell includes an anode layer, an electrolyte layer over a surface of the anode layer, and a cathode layer over a surface of the electrolyte layer. The cathode layer includes a cathode bulk layer, a porous cathode functional layer at an electrolyte, an intermediate cathode layer partitioning the cathode bulk layer and the porous cathode functional layer, the porous intermediate cathode layer having a porosity greater than that of the cathode bulk layer. The solid oxide fuel cells can be combined to form subassemblies that are bonded together to form solid oxide fuel cell assemblies.

SOFC cathode and method for cofired cells and stacks

A solid oxide fuel cell electrolyte is fabricated by combining an yttria-stabilized zirconia powder with &#x3b1;-AlOhaving a dparticle size in a range of between about 10 nm and about 200 nm and MnOto form an electrolyte precursor composition, and then sintering the electrolyte precursor composition to thereby form the electrolyte. The &#x3b1;-AlOand MnOcan be present in the electrolyte precursor composition in an amount in a range of between about 0.25 mol % and about 5 mol %. The electrolyte can be a component of a solid oxide fuel cell of the invention.

Co-doped YSZ electrolytes for solid oxide fuel cell stacks

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Shrewsbury, MA, United States of America

Guangyong Lin