Purdue Research Foundation

Massachusetts Institute of Technology

Rolls-royce Corporation

Rodney W Trice

Jeffrey Paul Youngblood

Andrew Schlup

Sungbo Shim

Sean E Landwehr

Evelyn N Wang

Stephanie Gong

Lin Zhao

Kyle Wilke

Olivia Brandt

Winnie Tan

William Costakis

Erich Weaver

Chad T Wilson

Rodrigo Orta Guerra

Bikram Bhatia

Andres Diaz-Cano

Xiangyu Li

Arny Leroy

Lenan Zhang

The present disclosure provides a transparent alumina-based plate, and a hot-pressing method to make the transparent alumina-based plate from platelet alumina. Alumina powder with a platelet morphology was hot-pressed to transparency with pre-load pressures of about 0-8 MPa, maximum temperatures of about 1750-1825° C., maximum pressures of about 2.5-80 MPa, and isothermal hold times of 1-7 hours. A novel alumina-based plate has been prepared, wherein the plate has a thickness of 2-5 mm, an in-line transmission of at least 60-75% for a light with a wavelength range of 645-2500 nm, an in-line transmission variance of <15% over the wavelength range of 645-2500 nm, and a relative density of 99.00-99.95%.

Transparent alumina-based plate and method of making thereof

Devices and methods for fabrication of a multiscale porous high-temperature heat exchanger for high-temperature and high-pressure applications are disclosed. The heat exchanger can include a core with macrochannels formed in a checkerboard pattern to facilitate alternative flow of working fluid having hot and cold temperatures between adjacent macrochannels. Each macrochannel can include a two-dimensional microchannel array that further distributes flow throughout the heat exchanger to enhance heat transfer and mechanical strength without significant pressure drop penalty. The heat exchanger can further include a header integrated therewith to distribute working fluid flowing through the heat exchanger through the outlets such that it flows evenly therethrough. Methods of fabricating heat exchangers of this nature are also disclosed.

Devices and methods for fabrication of components of a multiscale porous high-temperature heat exchanger

The present disclosure relates to boron carbide (BC) composite material and the method of making and using the boron carbide (BC) composite.

Boron carbide composite

A hypersonic refractory material, including a refractory leading edge portion for a hypersonic vehicle and a high emissivity oxide coating adhered to the refractory leading edge portion. The high emissivity oxide coating is ZrBdoped with a cation dopant material selected from the group including Sm, Tm, and mixtures thereof. The cation dopant material is present in a concentration of between 3 mole percent and 8 mole percent.

High emissivity materials and methods of manufacture

In some examples, an article may include a substrate and a coating on the substrate. The substrate may include a superalloy, a ceramic, or a ceramic matrix composite. The coating may include a layer comprising a matrix material and a plurality of nanoparticles. The matrix material may include at least one of silica, zirconia, alumina, titania, or chromia, and the plurality of nanoparticles may include nanoparticles including at least one of yttria, zirconia, alumina, or chromia. In some examples, an average diameter of the nanoparticles is less than about 400 nm.

Coating system including oxide nanoparticles in oxide matrix

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West Lafayette, IN, United States of America

Rodney W Trice