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1. 发明授权

US06390875B1 Method for enhancing thermal radiation transfer in X-ray tube components 失效
标题翻译：增强X射线管部件热辐射传递的方法
公开(公告)号：US06390875B1
公开(公告)日：2002-05-21
申请号：US09535019
申请日：2000-03-24
申请人： John M. Warren , Michael Price , Martin W. Plutowski
发明人： John M. Warren , Michael Price , Martin W. Plutowski
IPC分类号： H01J3510
CPC分类号： H01J35/04 , H01J2235/10 , H01J2235/12 , H01J2235/1237
摘要： A method is provided for enhancing heat transfer within an X-ray vacuum tube, from a hot component such as the rotating anode assembly to a cooler component such as the metal tube housing, by increasing surface emissivity of respective components. The method comprises the steps of fabricating each component from an alloy containing a specified minimum amount of chromium, and then implementing a first heating operation, wherein a fabricated component is heated in a dry hydrogen atmosphere for a first specified time period. Thereafter, a second heating operation is implemented, wherein the fabricated component is heated in a wet hydrogen atmosphere for a second specified time period. This procedure forms a refractory chromium oxide coating on the component that exhibits high absorption in the NIR region of the electromagnetic spectrum.
摘要翻译：提供了一种通过增加各个部件的表面发射率来增强X射线真空管内的热传递的方法，从诸如旋转阳极组件的热部件到诸如金属管壳体的较冷部件。该方法包括以下步骤：从含有规定的最小量的铬的合金制造每个组分，然后实施第一加热操作，其中将制造的组分在干燥氢气氛中加热第一特定时间段。此后，实施第二加热操作，其中制造的部件在湿氢气氛中加热第二特定时间段。该方法在组分上形成耐火铬氧化物涂层，其在电磁光谱的NIR区域中表现出高吸收。

2. 发明授权

US06421423B1 Two-step brazed X-ray target assembly 失效
标题翻译：两步钎焊X射线靶组件
公开(公告)号：US06421423B1
公开(公告)日：2002-07-16
申请号：US09966788
申请日：2001-09-28
申请人： John M. Warren
发明人： John M. Warren
IPC分类号： H01J3510
CPC分类号： C04B37/026 , B23K35/32 , B23K35/325 , C04B2237/122 , C04B2237/363 , C04B2237/403 , C22C14/00 , H01J35/10 , H01J2235/084
摘要： A joining method designed to minimize the temperature needed to obtain a high strength braze joint between a molybdenum alloy substrate and a graphite disk used in a rotating anode X-ray tube target used for computed tomography applications. The method consists of two separate brazing operations. The first brazing operation joins a thin molybdenum sheet to the graphite disk using a pure metal braze to form a plated graphite subassembly. The second brazing operation joins the plated graphite subassembly to the molybdenum alloy substrate using a highly specialized braze alloy having a melt temperature below the recrystallization temperature of said molybdenum alloy substrate and a remelt temperature after brazing above the recrystallization temperature of said molybdenum alloy substrate. This two step brazing reduces the probability of fracture in the graphite by maintaining the elevated temperature yield strength normally developed in forged molybdenum alloy substrates by avoiding the deleterious yield strength reduction associated with recrystallization of the molybdenum alloy substrate.
摘要翻译：一种接合方法，其设计成使用于计算机断层成像应用的旋转阳极X射线管靶中使用的钼合金基板和石墨盘之间获得高强度钎焊接头所需的温度最小化。该方法由两个单独的钎焊操作组成。第一次钎焊操作使用纯金属钎焊将薄钼片连接到石墨盘上，以形成电镀石墨子组件。第二钎焊操作使用熔融温度低于所述钼合金基板的再结晶温度的高度专业化的钎焊合金和在所述钼合金基板的再结晶温度之后的钎焊之后的熔融温度，将镀覆的石墨子组件连接到钼合金基板。通过避免与钼合金基体的再结晶相关的有害的屈服强度降低，通过维持在锻造的钼合金基材中正常显现的升高的温度屈服强度，这两步钎焊降低了石墨中的断裂概率。

3. 发明授权

US06400800B1 Two-step brazed x-ray target assembly 失效
标题翻译：两步钎焊x射线靶组件
公开(公告)号：US06400800B1
公开(公告)日：2002-06-04
申请号：US09752190
申请日：2000-12-29
申请人： John M. Warren
发明人： John M. Warren
IPC分类号： H01J3510
CPC分类号： C04B37/026 , B23K35/32 , B23K35/325 , C04B2237/122 , C04B2237/363 , C04B2237/403 , C22C14/00 , H01J35/10 , H01J2235/084
摘要： A joining method designed to minimize the temperature needed to obtain a high strength braze joint between a molybdenum alloy substrate and a graphite disk used in a rotating anode X-ray tube target used for computed tomography applications. The method consists of two separate brazing operations. The first brazing operation joins a thin molybdenum sheet to the graphite disk using a pure metal braze to form a plated graphite subassembly. The second brazing operation joins the plated graphite subassembly to the molybdenum alloy substrate using a highly specialized braze alloy having a melt temperature below the recrystallization temperature of said molybdenum alloy substrate and a remelt temperature after brazing above the recrystallization temperature of said molybdenum alloy substrate. This two step brazing reduces the probability of fracture in the graphite by maintaining the elevated temperature yield strength normally developed in forged molybdenum alloy substrates by avoiding the deleterious yield strength reduction associated with recrystallization of the molybdenum alloy substrate.
摘要翻译：一种接合方法，其设计成使用于计算机断层成像应用的旋转阳极X射线管靶中使用的钼合金基板和石墨盘之间获得高强度钎焊接头所需的温度最小化。该方法由两个单独的钎焊操作组成。第一次钎焊操作使用纯金属钎焊将薄钼片连接到石墨盘上，以形成电镀石墨子组件。第二钎焊操作使用熔融温度低于所述钼合金基板的再结晶温度的高度专业化的钎焊合金和在所述钼合金基板的再结晶温度之后的钎焊之后的熔融温度，将镀覆的石墨子组件连接到钼合金基板。通过避免与钼合金基体的再结晶相关的有害的屈服强度降低，通过维持在锻造的钼合金基材中正常显现的升高的温度屈服强度，这两步钎焊降低了石墨中的断裂概率。

4. 发明授权

US06362481B1 X-ray detector apparatus with reduced thermal expansivity 失效
标题翻译：具有降低的热膨胀性的X射线检测器
公开(公告)号：US06362481B1
公开(公告)日：2002-03-26
申请号：US09414696
申请日：1999-10-07
申请人： John M. Warren
发明人： John M. Warren
IPC分类号： G01T120
CPC分类号： G01N23/083 , G01T1/2002 , G01T1/2018
摘要： A technique is disclosed for providing a solid state X-ray detector for a CT imaging system with an optical coupler having a substantially reduced coefficient of thermal expansivity (CTE). In accordance therewith, a prespecified amount of a ceramic scintillator material, in powdered form, is mixed with the resin component of an optical coupling material, such as transparent epoxy, which has resin and hardener components. Air bubbles are removed from the powdered scintillator-resin mixture, and a prespecified amount of the hardener component of the optical coupling material is combined therewith to provide a powdered scintillator-optical coupler composite. The CTE of the composite is substantially less than the CTE of epoxy only. A monolithic block or body of the ceramic scintillator material is placed in close, spaced-apart relationship with a photodiode device, and the gap therebetween is filled with the reduced CTE optical coupler composite to eliminate air spaces therefrom.
摘要翻译：公开了一种用于为具有基本上减小的热膨胀系数（CTE）的光耦合器的CT成像系统提供固态X射线检测器的技术。据此，预先规定量的粉末形式的陶瓷闪烁体材料与具有树脂和硬化剂组分的光学耦合材料如透明环氧树脂的树脂组分混合。从粉末状闪烁体 - 树脂混合物中除去气泡，并将预先规定量的光学偶联材料的固化剂组分与其结合，以提供粉末闪烁体 - 光耦合器复合材料。复合材料的CTE远小于环氧树脂的CTE。陶瓷闪烁体材料的整体块或体与光电二极管器件呈紧密间隔的关系，并且其间的间隙填充有减小的CTE光耦合器复合材料以消除空气空间。

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