Particles each having a sinterable core and a polymeric coating on at least a part of the core, wherein the polymeric coating includes a polymer that can be removed via decomposition by heat, catalytically or by solvent treatment, and wherein the polymeric coating is present in an amount of 0.10 to 3.00% by weight, relative to the total weight of the particles, as well as the use of these particles in an additive manufacturing process such as a powder bed and inkjet head 3D printing process. The particles and the process are able to provide a green part having improved strength and are thus suitable for the production of delicate structures which require a high green strength in order to minimize the risk of structural damage during green part handling.

A method of forming a shaped abrasive particle including extruding a mixture into a form, applying a dopant material to an exterior surface of the form, and forming a precursor shaped abrasive particle from the form.

A method for making a braking band (2) for a brake disc (1) for a disc brake, comprising the following steps: a) preparing a mold (10) having an inner cavity (11), which comprises a first portion (11a) of a shape corresponding to the braking band (2) to be made; b) preparing a band preform (20) comprising a central preform (200), an upper outer preform (201) and a lower outer preform (202), said central preform (200) being made of porous ceramic material comprising silicon carbide (SiC), said upper outer preform (201) and lower outer preform (202) being made of porous ceramic material comprising silicon carbide (SiC) and infiltrated with silicon (SiC+Si), wherein a carbon barrier layer (201a, 200a, 200b, 202a) made of carbon is interposed between the upper outer preform (201) and the central preform (200) and between the lower outer preform (202) and the central preform (200), said preforms (200, 201, 202) having the shape of the braking band (2) to be made; c) placing said band preform (20) inside the mold at the first portion (11a) of said inner cavity (11); and d) injecting a liquid or semi-solid aluminum alloy inside the entire inner cavity (11) of the mold (11) to infiltrate the central preform (200) of said band preform (20) made of porous ceramic material with said aluminum alloy, obtaining at the first portion (11a) an aluminum metal matrix composite reinforced by said central preform (200) which defines the braking band (2) to be made. A braking band and a brake disc are made with at least the aforesaid method.

A method for making a braking band (2) for a brake disc (1) for a disc brake, comprising the following steps: a) preparing a mold (10) having an inner cavity (11), which comprises a first portion (11a) of a shape corresponding to the braking band (2) to be made; b) preparing a band preform (20) comprising a central layer (200) made of porous ceramic material comprising silicon carbide (SiC), an upper outer layer (201) and a lower outer layer (202), said upper outer layer (201) and said lower outer layer (202) being made of porous ceramic material comprising silicon carbide (SiC) and infiltrated with silicon (SiC+Si), said upper outer layer (201) and said bottom outer layer (202) being arranged in an opposing way and on opposite sides of the central layer (200); c) placing said band preform (20) inside the mold at the first portion (11a) of said inner cavity (11); and d) injecting a liquid or semi-solid aluminum alloy inside the entire inner cavity (11) of the mold (11) so as to infiltrate only the central layer (200) of said band preform (20) made of porous ceramic material with said aluminum alloy, obtaining at the first portion (11a) an aluminum metal matrix composite reinforced by said central preform (200) which defines the braking band (2) to be made. A braking band and a brake disc are made at least with the aforesaid method.

The method includes the steps of: a) selecting particles with particular slenderness ratios and diameters from SiC powder to serve as selected SiC material powder; b) coating a PVA coating on particles of the selected SiC material powder so that the PVA coating and the selected SiC material powder are combined into a particulate ceramic material; c) pressing the particulate ceramic material into a ceramic base body; d) sintering the ceramic base body to form a fixed shape and forming completely continuous channels from an inside to a surface thereof by cooling; and e) infiltrating the ceramic base body with molten aluminum. The ceramic composite material made by the method includes a ceramic base body having completely continuous channels from an inside to a surface thereof; an aluminum filler filled in the channels; and an aluminum coating disposed on the ceramic base body and integratedly connecting with the aluminum filler.

A method for fabricating a filter member includes: mixing a predetermined amount of zeolite with alumina to form a composite mixture; spraying a coating material onto the composite mixture to form a coated composite mixture including granules; filtering the granules to obtain granules having a predetermined length dimension; shaping the obtained granules to form a compacted disc having a predetermined thickness; and heat-treating the compacted disc to form a filter member.

The present disclosure relates more particularly to roofing granules, such as solar-reflective roofing granules, and to methods for making and using them in roofing products. Provided are, for example, a collection of solar-reflective roofing granules having a solar reflectivity of at least 70%, (e.g., at least 80 wt % or even at least 90 wt %) of the solar-reflective roofing granules of the collection having a major aspect ratio of at least 4 and a minor aspect ratio of at least 3. Also provided is a roofing product that includes a substrate; a bituminous material coated on the substrate, the bituminous material having a top surface; and a collection of solar-reflective roofing granules as described herein disposed on the top surface of the bituminous material, thereby substantially coating the bituminous material in a region thereof.

A ceramic dielectric including: a bulk dielectric including barium (Ba) and titanium (Ti); a ceramic nanosheet; and a composite dielectric of the bulk dielectric and the ceramic nanosheet.

The present disclosure relates to systems, methods and resins for additive manufacturing. In one embodiment, a method for additive manufacturing of a ceramic structure includes providing a resin including a preceramic polymer and inorganic ceramic filler particles dispersed in the preceramic polymer. The preceramic polymer is configured to convert to a ceramic phase. The method includes functionalizing inorganic ceramic filler particles with a reactive group and applying an energy source to the resin to create at least one layer of the ceramic phase from the resin.

A device and a process for forming a monolithic substantially closed-porosity ceramic fluidic device having a tortuous fluid passage extending through the device, the tortuous fluid passage having a smooth interior surface, a material of the ceramic body having a continuous and uniform distribution of grains at least between opposed major surfaces of the ceramic body. The process includes positioning a positive fluid passage mold within a volume of binder-coated ceramic powder, pressing the volume of ceramic powder with the mold inside to form a pressed body, heating the pressed body to remove the mold, and sintering the pressed body. A relationship between a first stability characteristic of the volume of ceramic powder and a second stability characteristic of the mold prevents discontinuities in the pressed body after pressing and/or during heating.