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

IPC: C22F1/18 ,  C22C1/04 ,  C22C14/00 ,  B22F9/22

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.

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

IPC: C22C1/04 ,  B22F3/10

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.

公开(公告)号：US20170021425A1

公开(公告)日：2017-01-26

申请号：US15234973

申请日：2016-08-11

Applicant: University of Utah Research Foundation

Inventor： Zhigang Z. Fang ,  Yang Xia ,  Pei Sun ,  Ying Zhang

IPC: B22F9/04 ,  B22F1/00 ,  C01B6/02 ,  B22F3/04 ,  B22F3/16 ,  B22F3/24 ,  B22F3/10 ,  B22F9/02

CPC classification number: B22F9/04 ,  B22F1/0003 ,  B22F1/0011 ,  B22F1/0048 ,  B22F1/0059 ,  B22F1/0096 ,  B22F3/04 ,  B22F3/1021 ,  B22F3/1055 ,  B22F3/15 ,  B22F3/16 ,  B22F3/225 ,  B22F3/24 ,  B22F9/026 ,  B22F2003/244 ,  B22F2009/001 ,  B22F2009/043 ,  B22F2201/11 ,  B22F2301/052 ,  B22F2301/15 ,  B22F2301/20 ,  B22F2301/205 ,  B22F2301/35 ,  B22F2302/45 ,  B22F2304/10 ,  B22F2304/15 ,  B22F2998/10 ,  B22F2999/00 ,  C01B6/02 ,  Y02P10/24 ,  Y02P10/295 ,  B22F1/0074 ,  B22F3/1025

Abstract: A method for producing a substantially spherical metal powder is described. A particulate source metal includes a primary particulate and has an average starting particle size. The particulate source metal is optionally ball milled and mixed with a binder in a solvent to form a slurry. The slurry is granulated to form substantially spherical granules, wherein each granule comprises an agglomeration of particulate source metal in the binder. The granules are debinded at a debinding temperature to remove the binder from the granules forming debinded granules. The debinded granules are at least partially sintered at a sintering temperature such that particles within each granule fuse together to form partially or fully sintered solid granules. The granules can then be optionally recovered to form a substantially spherical metal powder.

Abstract translation: 描述了一种生产基本上球形的金属粉末的方法。 颗粒源金属包括初级颗粒并具有平均起始粒度。 颗粒源金属任选地被球磨并与粘合剂在溶剂中混合以形成浆料。 将浆料造粒形成基本上为球形的颗粒，其中每个颗粒包含颗粒源金属在粘合剂中的聚集。 在脱脂温度下将颗粒脱粘，从形成脱模颗粒的颗粒中除去粘合剂。 剥离的颗粒在烧结温度下至少部分烧结，使得每个颗粒内的颗粒熔合在一起以形成部分或完全烧结的固体颗粒。 然后可以任选地回收颗粒以形成基本上为球形的金属粉末。