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公开(公告)号：US20170113273A1
公开(公告)日：2017-04-27
申请号：US15314464
申请日：2015-12-02
Applicant: University of Utah Research Foundation
Inventor： Zhigang Zak Fang , Pei Sun , Yang Xia , Ying Zhang
CPC classification number: B22F1/0088 , B22F1/0014 , B22F1/0085 , B22F9/20 , B22F2201/013 , B22F2201/11 , B22F2301/205 , B22F2304/10 , B22F2304/15 , B22F2998/10 , B22F2999/00 , C22B1/005 , C22B9/10 , C22B34/1295 , C22C1/04 , C22C14/00 , C22C27/02 , Y02P10/212 , B22F2201/01
Abstract: Methods of removing oxygen from a metal are described. In one example, a method (100) can include forming a mixture (110) including a metal, a calcium de-oxygenation agent, and a salt. The mixture can be heated (120) at a de-oxygenation temperature for a period of time to reduce an oxygen content of the metal, thus forming a de-oxygenated metal. The de-oxygenation temperature can be above a melting point of the salt and below a melting point of the calcium de-oxygenation agent. The de-oxygenated metal can then be cooled (130). The de-oxygenated metal can then be leached with water and acid to remove by-products and obtain a product (140).
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公开(公告)号：US20240165705A1
公开(公告)日：2024-05-23
申请号：US18518857
申请日：2023-11-24
Applicant: University of Utah Research Foundation
Inventor： Pei Sun , Nathan Jump , Madapusi Kande Keshavan , Zhigang Zak Fang
CPC classification number: B22F10/14 , B22F3/1007 , B22F3/1021 , B22F2201/013 , B22F2301/205 , B22F2304/10
Abstract: A method of making a densified sintered titanium article includes forming a powder bed of a titanium feedstock. A binder is applied to a portion of the powder bed to bind the titanium feedstock together, thereby forming a green body. The green body is debinded to remove at least a portion of the binder to form a debinded titanium article. The debinded titanium article is sintered at a sintering temperature in an atmosphere comprising hydrogen to produce a sintered titanium article. The sintered titanium article is held at a phase transition temperature to form a microstructure-controlled titanium article. The microstructure-controlled titanium article is dehydrogenated to form a densified sintered titanium article.
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公开(公告)号：US10689730B2
公开(公告)日：2020-06-23
申请号：US14935245
申请日：2015-11-06
Applicant: University of Utah Research Foundation
Inventor： Zhigang Zak Fang , Ying Zhang , Yang Xia , Pei Sun
Abstract: A method (500) for producing a titanium product is disclosed. The method (500) can include obtaining TiO2-slag (501) and reducing impurities in the TiO2-slag (502) to form purified TiO2 (503). The method (500) can also include reducing the purified TiO2 using a metallic reducing agent (504) to form a hydrogenated titanium product comprising TiH2 (505). The hydrogenated titanium product can be dehydrogenated (506) to form a titanium product (508). The titanium product can also be optionally deoxygenated (507) to reduce oxygen content.
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公开(公告)号：US20160108497A1
公开(公告)日：2016-04-21
申请号：US14935245
申请日：2015-11-06
Applicant: University of Utah Research Foundation
Inventor： Zhigang Zak Fang , Ying Zhang , Yang Xia , Pei Sun
Abstract: A method (500) for producing a titanium product is disclosed. The method (500) can include obtaining TiO2-slag (501) and reducing impurities in the TiO2-slag (502) to form purified TiO2 (503). The method (500) can also include reducing the purified TiO2 using a metallic reducing agent (504) to form a hydrogenated titanium product comprising TiH2 (505). The hydrogenated titanium product can be dehydrogenated (506) to form a titanium product (508). The titanium product can also be optionally deoxygenated (507) to reduce oxygen content.
Abstract translation: 公开了一种用于生产钛产品的方法（500）。 方法（500）可以包括获得TiO 2渣（501）和还原TiO 2渣（502）中的杂质以形成纯化的TiO 2（503）。 方法（500）还可以包括使用金属还原剂（504）还原纯化的TiO 2以形成包含TiH 2（505）的氢化钛产物。 可以将氢化钛产物脱氢（506）以形成钛产物（508）。 钛产物也可以任选脱氧（507）以减少氧含量。
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公开(公告)号：US10190191B2
公开(公告)日：2019-01-29
申请号：US14912846
申请日：2014-08-19
Applicant: University of Utah Research Foundation
Inventor： Zhigang Zak Fang , Peng Fan , Scott Middlemas , Jun Guo , Ying Zhang , Michael Free , Amarchand Sathyapalan , Yang Xia
Abstract: A method (400) for producing a titanium product is disclosed. The method (400) can include obtaining TiO2-slag (401), and producing a titanium product from the TiO2-slag using a metallic reducing agent (402) at a moderate temperature and a pressure to directly produce a titanium product chemically separated from metal impurities in the TiO2 slag (403). The titanium product can comprise TiH2 and optionally elemental titanium. Impurities in the titanium product can then removed (404) by leaching, purifying and separation to form a purified titanium product.
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Patent Agency Ranking
6.发明申请POWDER METALLURGY METHODS FOR THE PRODUCTION OF FINE AND ULTRAFINE GRAIN TI AND TI ALLOYS 有权用于生产精细和超细颗粒TI和TI合金的粉末冶金方法公开(公告)号：US20140255240A1
公开(公告)日：2014-09-11
申请号：US14152787
申请日：2014-01-10
Applicant: University of Utah Research Foundation
Inventor： Zhigang Zak Fang , Pei Sun , James Paramore , Hongtao Wang , Mark Koopman , Lu Yang
IPC: B22F3/24
CPC classification number: C22C1/0458 , B22F3/101 , B22F2999/00 , B22F2201/013 , B22F2201/20
Abstract: A process includes sintering hydrogenated titanium or titanium hydride (TiH2) and/or Ti metal in a dynamically controlled hydrogen atmosphere with hydrogen partial pressure greater than 0.01 atmosphere and at elevated temperature, to form a sintered titanium material; equilibrate the sintered material at an equilibration temperature below the sintering temperature and above the phase transformations including eutectoid decomposition temperature for an equilibration time sufficient for the hydrogen within the sample to reach equilibrium and homogenize the sintered titanium material; holding the sintered titanium material at a hold temperature below the temperature of sintering and a hold time sufficient for phase transformations including eutectoid decomposition of the sintered titanium material; and heating the sintered titanium material under vacuum, inert atmosphere, or a combination of both at a hold temperature which is less than that of the sintering temperature, to form titanium metal, or a titanium metal alloy with fine or ultrafine grain sizes; where the dynamically controlled hydrogen atmosphere varies as a function of time and temperature throughout the thermal cycle and includes hydrogen during the sintering and phase transformations including eutectoid decomposition steps.
Abstract translation: 一种方法包括在氢分压大于0.01大气压和升高的温度下在动态控制的氢气气氛中烧结氢化钛或氢化钛（TiH 2）和/或Ti金属，以形成烧结的钛材料; 在低于烧结温度的平衡温度和高于包括共析分解温度的相变的平衡温度下平衡烧结材料，以获得足以使样品内的氢达到平衡并使烧结的钛材料均匀化的平衡时间; 将烧结的钛材料保持在低于烧结温度的保持温度和足以进行相变的保持时间，包括烧结的钛材料的共析分解; 在低于烧结温度的保持温度下在真空，惰性气氛或二者的组合下加热烧结的钛材料，以形成钛金属或具有精细或超细晶粒尺寸的钛金属合金; 其中动态控制的氢气氛在整个热循环中随着时间和温度的变化而变化，并且在包括共析分解步骤的烧结和相变过程中包括氢。
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公开(公告)号：US11236408B1
公开(公告)日：2022-02-01
申请号：US17172874
申请日：2021-02-10
Applicant: University of Utah Research Foundation
Inventor： Zhigang Zak Fang , Kyu Sup Hwang
Abstract: A method of forming a functionally designed cemented tungsten carbide can include forming a particulate matrix mixture including a primary particulate tungsten carbide and a primary particulate metal binder. A particulate enhancement mixture can be formed having a secondary particulate tungsten carbide, a secondary particulate metal binder, and a particulate grain growth inhibitor, where the enhancement mixture has a finer particle size than the matrix mixture. The particulate matrix mixture can be assembled with the particulate enhancement mixture to form a structured composite where the matrix mixture forms a continuous phase and the enhancement mixture forms at least one of a dispersed granular phase and a surface layer adjacent the continuous phase to form the structured composite. This structured composite can be sintered to form the functionally designed cemented tungsten carbide having a differential grain size with the enhancement phase having a smaller grain size than the matrix phase.
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公开(公告)号：US10907239B1
公开(公告)日：2021-02-02
申请号：US16820413
申请日：2020-03-16
Applicant: University of Utah Research Foundation
Inventor： Zhigang Zak Fang , Yang Xia , Pei Sun , Ying Zhang
Abstract: A method for producing a particulate titanium alloy product can include preparing a composite particulate oxide mixture with TiO2 powder and at least one alloying element powder. The composite particulate oxide mixture can be co-reduced using a metallic reducing agent under a hydrogen atmosphere at a reduction temperature for a reduction time sufficient to produce a hydrogenated titanium alloy product. The hydrogenated titanium alloy product can then be heat treated under a hydrogen atmosphere and a heat treating temperature to reduce pore size and specific surface area to form a heat treated hydrogenated titanium product. The heat treated hydrogenated titanium product can be deoxygenated to reduce residual oxygen to less than 0.2 wt % to form a deoxygenated hydrogenated titanium product as a particulate. The deoxygenated hydrogenated titanium product can optionally be dehydrogenated to form the titanium alloy product as a particulate.
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9.发明授权公开(公告)号：US09816157B2
公开(公告)日：2017-11-14
申请号：US14152787
申请日：2014-01-10
Applicant: University of Utah Research Foundation
Inventor： Zhigang Zak Fang , Pei Sun , James Paramore , Hongtao Wang , Mark Koopman , Lu Yang
CPC classification number: C22C1/0458 , B22F3/101 , B22F2999/00 , B22F2201/013 , B22F2201/20
Abstract: A process includes sintering hydrogenated titanium or titanium hydride (TiH2) and/or Ti metal in a dynamically controlled hydrogen atmosphere with hydrogen partial pressure greater than 0.01 atmosphere and at elevated temperature, to form a sintered titanium material; equilibrate the sintered material at an equilibration temperature below the sintering temperature and above the phase transformations including eutectoid decomposition temperature for an equilibration time sufficient for the hydrogen within the sample to reach equilibrium and homogenize the sintered titanium material; holding the sintered titanium material at a hold temperature below the temperature of sintering and a hold time sufficient for phase transformations including eutectoid decomposition of the sintered titanium material; and heating the sintered titanium material under vacuum, inert atmosphere, or a combination of both at a hold temperature which is less than that of the sintering temperature, to form titanium metal, or a titanium metal alloy with fine or ultrafine grain sizes; where the dynamically controlled hydrogen atmosphere varies as a function of time and temperature throughout the thermal cycle and includes hydrogen during the sintering and phase transformations including eutectoid decomposition steps.
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公开(公告)号：US20230138417A1
公开(公告)日：2023-05-04
申请号：US17912305
申请日：2021-02-01
Applicant: University of Utah Research Foundation
Inventor： Zhigang Zak Fang , Yang Xia , Pei Sun , Ying Zhang
Abstract: A method (100) for producing a particulate titanium alloy product can include preparing (110) a composite particulate oxide mixture with TiO2 powder and at least one alloying element powder. The composite particulate oxide mixture can be co-reduced (120) using a metallic reducing agent under a hydrogen atmosphere at a reduction temperature for a reduction time sufficient to produce a hydrogenated titanium alloy product. The hydrogenated titanium alloy product can then be heat treated (130) under a hydrogen atmosphere and a heat treating temperature to reduce pore size and specific surface area to form a heat treated hydrogenated titanium product. The heat treated hydrogenated titanium product can be deoxygenated (140) to reduce residual oxygen to less than 0.2 wt % to form a deoxygenated hydrogenated titanium product as a particulate. The deoxygenated hydrogenated titanium product can optionally be dehydrogenated (150) to form the titanium alloy product as a particulate.
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