The present disclosure provides a method for coating a composite structure comprising the steps of applying a first slurry of a first phosphate glass composition on an outer surface of the composite structure. The first slurry comprises a first additive including at least one of molybdenum disulfide or tungsten disulfide. The method may further include heating the composite structure to a temperature sufficient to form a base layer adhered to the composite structure.

The present disclosure provides a method for coating a composite structure comprising the steps of applying a first slurry of a first phosphate glass composition on an outer surface of the composite structure. The first slurry comprises a first additive including at least one of molybdenum disulfide or tungsten disulfide. The method may further include heating the composite structure to a temperature sufficient to form a base layer adhered to the composite structure.

Embodiments of a sensor are disclosed herein. The sensor includes a ceramic substrate having a first major surface, a second major surface opposite to the first major surface, and a thickness measured from the first major surface to the second major surface. The thickness is from 10 μm to 200 μm. A piezoelectric layer is disposed on the first major surface of the ceramic substrate, and the piezoelectric layer has a thickness of 10 μm or less. At least one electrical contact is disposed on the piezoelectric layer or between the ceramic substrate and the piezoelectric layer or both on the piezoelectric layer and between the ceramic substrate and the piezoelectric layer. A wearable device including such a sensor is also disclosed herein as well as a method of manufacturing same.

According to one or more embodiments of the present invention, a mirrored apparatus includes a substrate with a non-metal inorganic material that is non-diamond turnable. The mirrored apparatus further includes a finish layer arranged on the surface of the substrate. The finish layer has a polished surface opposite the substrate. The mirrored apparatus also includes a reflective layer arranged on the polished surface of the finish layer.

According to one or more embodiments of the present invention, a mirrored apparatus includes a substrate with a non-metal inorganic material that is non-diamond turnable. The mirrored apparatus further includes a finish layer arranged on the surface of the substrate. The finish layer has a polished surface opposite the substrate. The mirrored apparatus also includes a reflective layer arranged on the polished surface of the finish layer.

A dry gas seal assembly for use with a rotating machine that includes a rotating shaft, the seal assembly comprises a seal face bears a solid coating comprising molybdenum disulfide, graphene oxide, and optionally polydopamine, preferably wherein the graphene oxide to molybdenum disulfide ratio is 8:10 to 10:8. A method for making a dry gas seal assembly comprises coating a homogeneous dispersion of graphene oxide and molybdenum disulfide on a seal face.

According to one or more embodiments of the present invention, a mirrored apparatus includes a substrate with a non-metal inorganic material that is non-diamond turnable. The mirrored apparatus further includes a finish layer arranged on the surface of the substrate. The finish layer has a polished surface opposite the substrate. The mirrored apparatus also includes a reflective layer arranged on the polished surface of the finish layer.

According to one or more embodiments of the present invention, a mirrored apparatus includes a substrate with a non-metal inorganic material that is non-diamond turnable. The mirrored apparatus further includes a finish layer arranged on the surface of the substrate. The finish layer has a polished surface opposite the substrate. The mirrored apparatus also includes a reflective layer arranged on the polished surface of the finish layer.

A catalytic refractory heating appliance includes a body formed from a silicon carbide refractory material having a porosity that permits ionic oxygen to pass through the refractory material. The body defines a gas flow channel. A catalyst coating is on a surface of the refractory material of the body, whereby the refractory material becomes an active component with catalytic capability. For example, when the catalytic refractory heating appliance is a fire tube carbon dioxide and sulfur compounds can be directly absorbed, or carbon monoxide is reduced to methane.

A catalytic refractory heating appliance includes a body formed from a silicon carbide refractory material having a porosity that permits ionic oxygen to pass through the refractory material. The body defines a gas flow channel. A catalyst coating is on a surface of the refractory material of the body, whereby the refractory material becomes an active component with catalytic capability. For example, when the catalytic refractory heating appliance is a fire tube carbon dioxide and sulfur compounds can be directly absorbed, or carbon monoxide is reduced to methane.