Abstract: Systems and methods are disclosed that include an additive manufacturing assembly having a printing area, a first nozzle comprising a first nozzle having a first aperture diameter and configured to dispense a first material in the printing area, and a second nozzle comprising a second nozzle having a second aperture diameter that is larger than the first aperture diameter and configured to dispense a second material in the printing area.

Abstract: A seal including a jacket including an annular body defining a central axis and a recess extending into the annular body concentric to the central axis, where the jacket includes at least 30 wt % of a PTFE and at least 10 wt % of a filler material, and where the filler material includes a boron-containing material, a nitrogen-containing material, a titanium-containing material, a silicon-containing material, a carbon fiber, a glass fiber, or a combination thereof; and an energizing element disposed in the recess, where the energizing element includes a gap-less spring.

Abstract: A seal including a jacket including an annular body defining a central axis and a recess extending into the annular body concentric to the central axis, where the jacket includes at least 30 wt% of a PTFE and at least 10 wt% of a filler material, and where the filler material includes a boron-containing material, a nitrogen-containing material, a titanium-containing material, a silicon-containing material, a carbon fiber, a glass fiber, or a combination thereof, where the jacket further includes a coating; and an energizing element disposed in the recess.

Abstract: Systems and methods include providing a stator vane bushing for a variable stator vane assembly having a movable stator vane and a stator vane housing disposed annularly about the movable stator vane. The bushing includes a flange, a barrel extending from the flange, and a central aperture extending through the flange and the barrel and is disposed in the housing and annularly about the stator vane. The bushing is formed from a ceramic material having a coefficient of thermal expansion (CTE) lower than or equal to a CTE of one or more of a stator vane and a housing of the variable stator vane assembly.

Abstract: A method of forming a three-dimensional body from a mixture, wherein the mixture can comprise dispersed solid polymeric particles and a curable binder. In a particular embodiment the solid polymeric particles can be fluoropolymeric particles. The method can include at least partial removal of the cured binder and sintering, to obtain a sintered polymeric three-dimensional body. In one embodiment, the sintered three-dimensional body can be PTFE.

Abstract: In one embodiment, an abrasive body can comprise a first surface having a first developed interfacial area ratio (Sdr1) and a second surface having a second developed interfacial area ratio (Sdr2), and wherein the Sdr1 is at least 35% different than the Sdr2.

Abstract: A monolithic porous body can comprise magneli phase titanium oxide and a developed interfacial area ratio Sdr of at least 60%. The monolithic body can further comprise a total porosity of at least 25% based on the total volume of the body. The monolithic porous body can have a high efficiency for the degradation of water pollutants if used as anode material in an electrolytic cell.

Abstract: A method of forming a three-dimensional body from a mixture, wherein the mixture can comprise dispersed solid polymeric particles and a curable binder. In a particular embodiment the solid polymeric particles can be fluoropolymeric particles. The method can include at least partial removal of the cured binder and sintering, to obtain a sintered polymeric three-dimensional body. In one embodiment, the sintered three-dimensional body can be PTFE.

Abstract: Systems and methods are disclosed that include an additive manufacturing assembly having a printing area, a first nozzle comprising a first nozzle having a first aperture diameter and configured to dispense a first material in the printing area, and a second nozzle comprising a second nozzle having a second aperture diameter that is larger than the first aperture diameter and configured to dispense a second material in the printing area.

Abstract: A method of forming a three-dimensional body from a mixture, wherein the mixture can comprise dispersed solid polymeric particles and a curable binder. In a particular embodiment the solid polymeric particles can be fluoropolymeric particles. The method can include at least partial removal of the cured binder and sintering, to obtain a sintered polymeric three-dimensional body. In one embodiment, the sintered three-dimensional body can be PTFE.

Abstract: A method for continuously forming a three-dimensional body from a mixture, the mixture comprising at least 15 vol % solid particles and a radiation curable material. The method allows the continuous production of three-dimensional bodies comprising to a high content ceramic particles at a forming speed of at least 25 mm/hour.

Abstract: A method for preparing silicon substrate having average crystallite size greater than or equal to 20 ?m, including at least the steps of: (i) providing polycrystalline silicon substrate of which average grain size is less than or equal to 10 ?m; (ii) subjecting substrate to overall homogeneous plastic deformation, at temperature of at least 1000° C.; (iii) subjecting substrate to localized plastic deformation in plurality of areas of substrate, called external stress areas, spacing between two consecutive areas being at least 20 ?m, local deformation of substrate being strictly greater than overall deformation carried out in step (ii); step (iii) being able to be carried out subsequent to or simultaneous to step (ii); and (iv) subjecting substrate obtained in step (iii) to recrystallization heat treatment in solid phase, at temperature strictly greater than temperature used in step (ii), in order to obtain desired substrate.

Abstract: A method for preparing silicon substrate having average crystallite size greater than or equal to 20 ?m, including at least the steps of: (i) providing polycrystalline silicon substrate of which average grain size is less than or equal to 10 ?m; (ii) subjecting substrate to overall homogeneous plastic deformation, at temperature of at least 1000° C.; (iii) subjecting substrate to localised plastic deformation in plurality of areas of substrate, called external stress areas, spacing between two consecutive areas being at least 20 ?m, local deformation of substrate being strictly greater than overall deformation carried out in step (ii); step (iii) being able to be carried out subsequent to or simultaneous to step (ii); and (iv) subjecting substrate obtained in step (iii) to recrystallisation heat treatment in solid phase, at temperature strictly greater than temperature used in step (ii), in order to obtain desired substrate.

Abstract: Silicon sintering method, without applying an external force, comprising placement of a silicon sample in a furnace, then heat treatment of this sample at, at least one temperature and at least one partial pressure of oxidising species to control the thickness of a silicon oxide layer on its surface.