公开(公告)号：US06793883B2

公开(公告)日：2004-09-21

申请号：US09681993

申请日：2001-07-05

申请人： Peter Louis Andresen ,  Thomas Martin Angeliu ,  Young Jin Kim ,  Thomas Pompilio Diaz ,  Samson Hettiarachchi

发明人： Peter Louis Andresen ,  Thomas Martin Angeliu ,  Young Jin Kim ,  Thomas Pompilio Diaz ,  Samson Hettiarachchi

IPC分类号： C23F1102

CPC分类号： G21C17/0225 ,  B01J23/42 ,  B01J35/0013 ,  B01J35/0053 ,  B01J35/006 ,  C23F11/18 ,  G21C19/307 ,  G21Y2002/103 ,  G21Y2004/20

摘要： A method and system for reducing stress corrosion cracking in a hot water system, such as a nuclear reactor, by reducing the electrochemical corrosion potential of components exposed to high temperature water within the structure. The method includes the steps of: providing a reducing species to the high temperature water; and providing a plurality of noble metal nanoparticles having a mean particle size of up to about 100 nm to the high temperature water during operation of the hot water system. The catalytic nanoparticles, which may contain at least one noble metal, form a colloidal suspension in the high temperature water and provide a catalytic surface on which a reducing species reacts with least one oxidizing species present in the high temperature water. The concentration of the oxidizing species is reduced by reaction with the reducing species on the catalytic surface, thereby reducing the electrochemical corrosion potential of the component.

摘要翻译： 通过降低暴露在结构内的高温水的组分的电化学腐蚀电位，减少诸如核反应堆的热水系统中的应力腐蚀开裂的方法和系统。 该方法包括以下步骤：向高温水提供还原物质; 并且在热水系统的操作期间向高温水提供多个平均粒度高达约100nm的贵金属纳米颗粒。 可以含有至少一种贵金属的催化纳米颗粒在高温水中形成胶体悬浮液，并提供催化表面，还原物质与高温水中存在的至少一种氧化物质反应。 通过与催化剂表面上的还原物质反应来降低氧化物质的浓度，从而降低组分的电化学腐蚀电位。

公开(公告)号：US06251159B1

公开(公告)日：2001-06-26

申请号：US09218635

申请日：1998-12-22

申请人： Thomas Martin Angeliu ,  Charles Gitahi Mukira

发明人： Thomas Martin Angeliu ,  Charles Gitahi Mukira

IPC分类号： C21D1000

CPC分类号： C22C1/1036 ,  C21D10/00 ,  C21D2211/004 ,  C21D2281/00 ,  C22C2001/1047 ,  Y10S977/773 ,  Y10S977/779 ,  Y10S977/784 ,  Y10S977/847 ,  Y10S977/882

摘要： A dispersion strengthening method for metallic melts that are used to form large articles. The method comprises adding nanophase particles into a molten metallic melt and dispersing the nanophase particles in the metallic melt. The nanophase particles comprising particles with diameters in the range of about 5 nanometers to about 100 nanometers. The step of dispersing the nanophase particles in the metallic melt spaces the particles from each other with an average interparticle spacing (IPS) in a range from about 10 nanometers to about 500 nanometers.

摘要翻译： 用于形成大型物品的金属熔体的分散强化方法。 该方法包括将纳米相颗粒加入到熔融金属熔体中并将纳米相颗粒分散在金属熔体中。 包含直径在约5纳米至约100纳米范围内的颗粒的纳米相颗粒。 将纳米相颗粒分散在金属熔体中的步骤使颗粒彼此间隔开，平均颗粒间距（IPS）在约10纳米至约500纳米的范围内。