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11. 发明授权

US06428636B2 Semi-solid concentration processing of metallic alloys 有权
标题翻译：金属合金的半固体浓缩加工
公开(公告)号：US06428636B2
公开(公告)日：2002-08-06
申请号：US09361336
申请日：1999-07-26
申请人： Don Doutre , Gary Hay , Peter Wales
发明人： Don Doutre , Gary Hay , Peter Wales
IPC分类号： B22D2704
CPC分类号： B22D17/007 , C22C1/005 , C22C21/02 , Y10S164/90
摘要： A metallic alloy having a semi-solid range between the liquidus temperature and the solidus temperature of the metallic alloy is processed by cooling the metallic alloy from an initial metallic alloy elevated temperature to a semi-solid temperature of less than the liquidus temperature and more than the solidus temperature, and maintaining the metallic alloy at the semi-solid temperature for a sufficient time to produce a semi-solid structure in the metallic alloy of a globular solid phase dispersed in a liquid phase. The cooling may be accomplished by providing a crucible at a crucible initial temperature below the solidus temperature, pouring the metallic alloy into the crucible, and allowing the metallic alloy and the crucible to reach a thermal equilibrium between the liquidus temperature and the solidus temperature of the metallic alloy. The method further includes removing at least some, but not all, of the liquid phase present in the semi-solid structure of the metallic alloy to form a solid-enriched semi-solid structure of the metallic alloy, and forming the metallic alloy having the solid-enriched semi-solid structure into a shape.
摘要翻译：通过将金属合金从初始金属合金升高温度冷却至低于液相线温度的半固体温度，将金属合金的液固温度和金属合金的固相线温度之间的半固体范围的金属合金加工成固相线温度，并将金属合金在半固态温度下保持足够的时间以在分散在液相中的球形固相的金属合金中产生半固体结构。冷却可以通过在低于固相线温度的坩埚初始温度下提供坩埚，将金属合金倒入坩埚中，并使金属合金和坩埚达到液相线温度与液相线温度之间的热平衡金属合金。该方法还包括去除金属合金的半固体结构中存在的至少一些但不是全部的液相，以形成金属合金的富集固体的半固体结构，并且形成具有固体富集半固体结构成形。

12. 发明授权

US06257312B1 Preparation of metal-matrix composite materials with high particulate loadings by concentration 失效
标题翻译：通过浓缩制备高颗粒负荷的金属基复合材料
公开(公告)号：US06257312B1
公开(公告)日：2001-07-10
申请号：US09131131
申请日：1998-08-07
申请人： Don Doutre , Gary Hay , Iljoon Jin , Peter Wales , David J. Lloyd
发明人： Don Doutre , Gary Hay , Iljoon Jin , Peter Wales , David J. Lloyd
IPC分类号： B22D1914
CPC分类号： C22C1/1036 , C22C1/1094 , C22C2001/1047 , H01L23/15 , H01L23/3733 , H01L2924/0002 , H01L2924/00
摘要： A composite material having less than about 25 volume percent refractory particles in a metal matrix is concentrated to have about 37-45 volume percent refractory particles. The concentrating is accomplished by heating the composite material to melt the matrix, and then contacting the molten composite material to a porous element having an average pore size greater than that of the average particle size. A small pressure differential, on the order of about one atmosphere, is applied across the porous element, so that metal matrix material separates from the composite material and flows through the porous element. The particulate volume fraction in the composite material gradually increases. When the particulate volume fraction exceeds about 37 volume percent, the mass of composite material becomes semi-solid and freestanding. The resulting composite material may be further processed, as by forming to a useful shape or diluting with another matrix material.
摘要翻译：在金属基质中具有少于约25体积％的难熔颗粒的复合材料被浓缩以具有约37-45体积％的耐火颗粒。浓缩通过加热复合材料以熔化基质，然后使熔融的复合材料与平均孔径大于平均粒径的多孔元件接触来实现。大约一个大气压的小压差施加在多孔元件上，使得金属基质材料与复合材料分离并流过多孔元件。复合材料中的颗粒体积分数逐渐增加。当颗粒体积分数超过约37体积％时，复合材料的质量变成半固体和独立的。所得到的复合材料可以进一步加工，如通过形成有用的形状或用另一种基质材料稀释。

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