Patents by Inventor Mitra Lenore TAHERI
Mitra Lenore TAHERI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230230735Abstract: A soft magnetic composite comprising an iron or iron alloy ferromagnetic material coated with an oxide material. An interface between the ferromagnetic material and the layer of oxide contains antiphase domain boundaries. Two processes for producing a soft magnetic composite are also provided. One process includes depositing an oxide layer onto an iron or iron alloy ferromagnetic material by molecular beam epitaxy at a partial oxygen pressure of from 1×10?5 Torr to 1×10?7 Torr to form a coated composite. The other process includes milling an iron or iron alloy ferromagnetic material powder and an oxide powder by high-energy milling to form a mixture; compacting the mixture and curing in an inert gas atmosphere at a temperature from 500° C. to 1200° C. to form a soft magnetic composite.Type: ApplicationFiled: February 28, 2023Publication date: July 20, 2023Applicant: DREXEL UNIVERSITYInventors: Mitra Lenore Taheri, Katie Jo Sunday, Steven Richard Spurgeon, Steven Joseph May
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Publication number: 20210104342Abstract: A soft magnetic composite comprising an iron or iron alloy ferromagnetic material coated with an oxide material. An interface between the ferromagnetic material and the layer of oxide contains antiphase domain boundaries. Two processes for producing a soft magnetic composite are also provided. One process includes depositing an oxide layer onto an iron or iron alloy ferromagnetic material by molecular beam epitaxy at a partial oxygen pressure of from 1×10?5 Torr to 1×10?7 Torr to form a coated composite. The other process includes milling an iron or iron alloy ferromagnetic material powder and an oxide powder by high-energy milling to form a mixture; compacting the mixture and curing in an inert gas atmosphere at a temperature from 500° C. to 1200° C. to form a soft magnetic composite.Type: ApplicationFiled: December 10, 2020Publication date: April 8, 2021Applicant: DREXEL UNIVERSITYInventors: Mitra Lenore Taheri, Katie Jo Sunday, Steven Richard Spurgeon, Steven Joseph May
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Publication number: 20200024729Abstract: A process for producing a radiation resistant nanocrystalline material having a polycrystalline microstructure from a starting material selected from metals and metal alloys. The process including depositing the starting material by physical vapor deposition onto a substrate that is maintained at a substrate temperature from about room temperature to about 850° C. to produce the nanocrystalline material. The process may also include heating the nanocrystalline material to a temperature of from about 450° C. to about 800° C. at a rate of temperature increase of from about 2° C./minute to about 30° C./minute; and maintaining the nanocrystalline material at the temperature of from about 450° C. to about 800° C. for a period from about 5 minutes to about 35 minutes. The nanocrystalline materials produced by the above process are also described. The nanocrystalline materials produced by the process are resistant to radiation damage.Type: ApplicationFiled: December 18, 2018Publication date: January 23, 2020Applicant: Drexel UniversityInventors: Mitra Lenore Taheri, Greg Vetterick
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Publication number: 20200024714Abstract: A process for grain boundary engineering of an aluminum alloy of AA5XXX series which includes steps of annealing the aluminum alloy at a first temperature of from about 350° C. to about 450° C.; deforming the annealed aluminum alloy to reduce the thickness by from about 2% to about 20% of the original thickness of the aluminum alloy; heat treating the deformed aluminum alloy at a second temperature from about 450° C. to about 550° C., and optionally sensitizing the heat treated alloy in one or more sensitizing steps. Aluminum alloys of the AA5XXX series treated by the process of the present invention are also provided.Type: ApplicationFiled: February 1, 2019Publication date: January 23, 2020Applicant: Drexel UniversityInventors: Mitra Lenore Taheri, Daniel Scotto D'Antuono, Joseph Hsieh
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Publication number: 20190185979Abstract: An annealing process for treatment of an aluminum alloy of AA5XXX series which comprises steps of annealing the aluminum alloy at a first temperature of from about 350° C. to about 450° C. by a rate of temperature increase from about 0.1° C./s to about 0.5° C./s; and cooling down the annealed aluminum alloy to a temperature below 50° C. Aluminum alloys of the AA5XXX series treated by the annealing process of the present invention are also provided.Type: ApplicationFiled: February 26, 2019Publication date: June 20, 2019Applicant: Drexel UniversityInventors: Mitra Lenore Taheri, Daniel Scotto D'Antuono
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Patent number: 9568442Abstract: A sample material is scanned with a transmission electron microscope (TEM) over multiple steps having a predetermined size at a predetermined angle. Each scan at a predetermined step and angle is compared to a template, wherein the template is generated from parameters of the material and the scanning. The data is then analyzed using local mis-orientation mapping and/or Nye's tensor analysis to provide information about local strain states.Type: GrantFiled: May 23, 2014Date of Patent: February 14, 2017Assignee: Drexel UniversityInventors: Mitra Lenore Taheri, Asher Calvin Leff
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Publication number: 20170002456Abstract: A process for producing a radiation resistant nanocrystalline material having a polycrystalline microstructure from a starting material selected from metals and metal alloys. The process including depositing the starting material by physical vapor deposition onto a substrate that is maintained at a substrate temperature from about room temperature to about 850° C. to produce the nanocrystalline material. The process may also include heating the nanocrystalline material to a temperature of from about 450° C. to about 800° C. at a rate of temperature increase of from about 2° C./minute to about 30° C./minute; and maintaining the nanocrystalline material at the temperature of from about 450° C. to about 800° C. for a period from about 5 minutes to about 35 minutes. The nanocrystalline materials produced by the above process are also described. The nanocrystalline materials produced by the process are resistant to radiation damage.Type: ApplicationFiled: December 22, 2014Publication date: January 5, 2017Applicant: Drexel UniversityInventors: Mitra Lenore Taheri, Greg Vetterick
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Publication number: 20160307679Abstract: A soft magnetic composite comprising an iron or iron alloy ferromagnetic material coated with an oxide material. An interface between the ferromagnetic material and the layer of oxide contains antiphase domain boundaries. Two processes for producing a soft magnetic composite are also provided. One process includes depositing an oxide layer onto an iron or iron alloy ferromagnetic material by molecular beam epitaxy at a partial oxygen pressure of from 1×10?5 Torr to 1×10?7 Torr to form a coated composite. The other process includes milling an iron or iron alloy ferromagnetic material powder and an oxide powder by high-energy milling to form a mixture; compacting the mixture and curing in an inert gas atmosphere at a temperature from 500° C. to 1200° C. to form a soft magnetic composite.Type: ApplicationFiled: December 22, 2014Publication date: October 20, 2016Applicant: Drexel UniversityInventors: Mitra Lenore TAHERI, Katie Jo SUNDAY, Steven Richard SPURGEON, Steven Joseph MAY
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Publication number: 20160201177Abstract: A process for grain boundary engineering of an aluminum alloy of AA5XXX series which includes steps of annealing the aluminum alloy at a first temperature of from about 350° C. to about 450° C.; deforming the annealed aluminum alloy to reduce the thickness by from about 2% to about 20% of the original thickness of the aluminum alloy; heat treating the deformed aluminum alloy at a second temperature from about 450° C. to about 550° C., and optionally sensitizing the heat treated alloy in one or more sensitizing steps. Aluminum alloys of the AA5XXX series treated by the process of the present invention are also provided.Type: ApplicationFiled: August 21, 2014Publication date: July 14, 2016Applicant: Drexel UniversityInventors: Mitra Lenore TAHERI, Daniel Scotto D'ANTUONO, Joseph HSIEH
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Publication number: 20160186301Abstract: An annealing process for treatment of an aluminum alloy of AA5XXX series which comprises steps of annealing the aluminum alloy at a first temperature of from about 350° C. to about 450° C. by a rate of temperature increase from about 0.1° C./s to about 0.5° C./s; and cooling down the annealed aluminum alloy to a temperature below 50° C. Aluminum alloys of the AA5XXX series treated by the annealing process of the present invention are also provided.Type: ApplicationFiled: August 21, 2014Publication date: June 30, 2016Applicant: Drexel UniversityInventors: Mitra Lenore TAHERI, Daniel Scotto D'ANTUONO
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Publication number: 20160139063Abstract: A sample material is scanned with a transmission electron microscope (TEM) over multiple steps having a predetermined size at a predetermined angle. Each scan at a predetermined step and angle is compared to a template, wherein the template is generated from parameters of the material and the scanning. The data is then analyzed using local mis-orientation mapping and/or Nye's tensor analysis to provide information about local strain states.Type: ApplicationFiled: May 23, 2014Publication date: May 19, 2016Applicant: Drexel UniversityInventors: Mitra Lenore TAHERI, Asher Clavin LEFF