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2. 发明申请

US20050211341A1 High strength alloys and methods for making same 失效
标题翻译：高强度合金及其制造方法
公开(公告)号：US20050211341A1
公开(公告)日：2005-09-29
申请号：US11006162
申请日：2004-12-06
申请人： Robert Holzl , Robert Shinavski
发明人： Robert Holzl , Robert Shinavski
IPC分类号： C22C1/02 , C22C27/04 , C23C16/01 , C23C16/08 , C23C16/30 , C23C16/44 , C23C16/455 , B32B15/04
CPC分类号： C23C16/45523 , C22C1/02 , C22C27/04 , C23C16/01 , C23C16/08 , C23C16/30
摘要： A family of extremely fine-grained alloys are used to make coatings or free-standing bodies having desirable properties for use as a heat-resistant and wear-resistant material. In an illustrative embodiment, the alloys are comprised of a multiplicity of alternate, microcrystalline or nanocrystalline films of tungsten metal and tungsten compound. The tungsten compound film may be comprised of a tungsten carbide or a tungsten boride. The tungsten films are the primary films. Their desirable characteristics, in addition to their very fine crystalline habit, per se, are the high strength, high hardness, high resilience, and high fracture energy which these fine crystallites foster. They may be manufactured by a chemical vapor deposition process in which reactive gas flows are rapidly switched to produce alternate films with abrupt hetero-junctions and thereby to produce the useful micro-crystalline habit. The unique synthesis method allows effective control of critical flaw size. The structure is such that the primary films may be made sufficiently thick so as to assure some desirable ductile behavior, but sufficiently thin so as to have high yield strength by dint of their microcrystalline size, and as to limit the size of any flaws. The secondary films are made of enough thickness to prevent the epitaxial growth from one primary film to the next-deposited primary film and thin enough so that they can not contain a flaw of critical size. In addition, the exterior surface of any body made by this method may have a sufficiently smooth surface that the strength of the body is determined by the bulk properties of the material and not by surface flaws.
摘要翻译：一类非常细小的合金被用于制造具有期望性能的涂层或独立体，用作耐热和耐磨材料。在说明性实施例中，合金由钨金属和钨化合物的多个交替的微晶或纳米晶体膜组成。钨化合物膜可以由碳化钨或硼化钨组成。钨膜是初级膜。除了它们非常细的结晶习性之外，它们的理想特性本身是这些微晶所促成的高强度，高硬度，高弹性和高断裂能。它们可以通过化学气相沉积工艺制造，其中反应气体流动快速切换以产生具有突变异质结的交替膜，从而产生有用的微晶习性。独特的合成方法可以有效控制关键缺陷大小。该结构使得初级膜可以制得足够厚，以确保一些期望的延展性，但是足够薄，以便通过它们的微晶尺寸具有高屈服强度，并限制任何缺陷的尺寸。二次膜由足够的厚度制成，以防止从一个初级膜到下一次沉积的初级膜的外延生长，并且足够薄，使得它们不能包含临界尺寸的缺陷。此外，通过该方法制造的任何主体的外表面可以具有足够光滑的表面，使得身体的强度由材料的整体性质而不是表面缺陷确定。

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