公开(公告)号：US4279655A

公开(公告)日：1981-07-21

申请号：US109711

申请日：1980-01-04

申请人： Ronald C. Garvie ,  Richard H. J. Hannink ,  Neil A. McKinnon

发明人： Ronald C. Garvie ,  Richard H. J. Hannink ,  Neil A. McKinnon

IPC分类号： B21C3/02 ,  B21C25/02 ,  B23B27/14 ,  C04B35/486 ,  F01L1/14 ,  F02F7/00 ,  G01N3/00 ,  C04B35/48 ,  C01G25/02 ,  C01G27/02

CPC分类号： G01N3/56 ,  B21C25/025 ,  B21C3/02 ,  B23B27/148 ,  C04B35/486 ,  F01L1/14 ,  F01L1/143 ,  F02F7/0087 ,  F01L2101/02 ,  F05C2203/0895 ,  G01N2203/0222

摘要： A magnesia partially stabilized zirconia ceramic material possessing from about 2.8 to about 4.0 wt percent magnesia, and made from a zirconia powder containing no more than about 0.03 percent silica is described. The ceramic material has a microstructure, produced as a consequence of the method by which the material is made, which provides both high strength and good thermal shock resistance properties. This microstructure comprises grains of cubic stabilized zirconia within which are formed, during cooling from the firing temperature, precipitates of tetragonal zirconia. These precipitates are elliptical in shape, with a long axis of about 1500 Angstrom units. Additionally, some of the tetragonal zironcia precipitates are made to transform into a non-twinned microcrystalline monoclinic form of zirconia by reducing the temperature of the material to below 800.degree. C., then subsequently holding the material at a temperature in the range from 1000.degree. C. to about 1400.degree. C. The ceramic material may also contain up to 36 wt percent of hafnia. Such materials can be used for, inter alia, moulds, dies, tappet facings and cutting tools.

摘要翻译： 描述了氧化镁部分稳定的氧化锆陶瓷材料，其具有约2.8至约4.0重量％的氧化镁，并且由不超过约0.03％二氧化硅的氧化锆粉末制成。 陶瓷材料具有由制造材料的方法产生的微结构，其提供高强度和良好的耐热冲击性能。 该微观结构包括立方体稳定化的氧化锆颗粒，在烧结温度冷却期间，形成四方晶氧化锆的析出物。 这些沉淀物的形状为椭圆形，长轴为约1500埃单位。 另外，通过将材料的温度降低到800℃以下，将一些四方晶系析出物转变成非双晶的微晶单斜晶型的氧化锆，然后将材料保持在1000℃ C.至约1400℃。陶瓷材料还可含有至多36重量％的铪。 这些材料尤其可用于模具，模具，挺杆面和切削工具。

公开(公告)号：US5296420A

公开(公告)日：1994-03-22

申请号：US892728

申请日：1992-05-29

申请人： Ronald C. Garvie

发明人： Ronald C. Garvie

IPC分类号： C04B35/00 ,  C04B35/101 ,  C04B35/106 ,  C04B35/117 ,  C04B35/119 ,  C04B35/18 ,  C04B35/185 ,  C04B35/20 ,  C04B35/443 ,  C04B35/468 ,  C04B35/565 ,  C04B35/584 ,  C04B35/48

CPC分类号： C04B35/106 ,  C04B35/117 ,  C04B35/119 ,  C04B35/185 ,  C04B35/20 ,  C04B35/443 ,  C04B35/4682 ,  C04B35/565 ,  C04B35/584

摘要： A relatively dense composite refractory material which has reasonable strength and good thermal shock resistance comprises an alumina matrix material within which are dispersed particles of polycrystalline zirconia comprises from 1.0 to 40 percent by volume of the composite material. Each particle of zirconia is an agglomerate of microcrystals which are strongly bonded together. Due to the agglomerates of the bonding together of the microcrystals at their grain boundaries. The microcrystals contain no matrix material within their agglomerates, and exhibit strong thermal expansion anisotropy. They have a size such that cracks do not form spontaneously within the agglomerates during cooling from about 1600.degree. C. to room temperature. Typically the agglomerates have a mean diameter of from 10 to 15 micrometers, while the average diameter of the microcrystals in an agglomerate is from 1 to 2 micrometers.

摘要翻译： 具有合理强度和良好耐热冲击性的相对致密的复合耐火材料包括氧化铝基体材料，其中多晶氧化锆的分散颗粒包含1.0至40体积％的复合材料。 氧化锆的每个颗粒是强结合在一起的微晶团聚物。 由于微晶在其晶界处的结合在一起的聚集体。 微晶在其附聚物中不含基质材料，并表现出强烈的热膨胀各向异性。 它们的尺寸使得在约1600℃至室温的冷却期间，团块内不会自发形成裂纹。 通常，附聚物的平均直径为10至15微米，而附聚物中微晶的平均直径为1至2微米。

公开(公告)号：US4885266A

公开(公告)日：1989-12-05

申请号：US218419

申请日：1988-07-12

申请人： Robert R. Hughan ,  Richard H. J. Hannink ,  Michael V. Swain ,  Robert K. Stringer ,  Michael J. Murray ,  Ronald C. Garvie

发明人： Robert R. Hughan ,  Richard H. J. Hannink ,  Michael V. Swain ,  Robert K. Stringer ,  Michael J. Murray ,  Ronald C. Garvie

IPC分类号： C04B35/48 ,  C04B35/486 ,  C04B35/64

CPC分类号： C04B35/486

摘要： Magnesia partially stabilized zirconia materials, having a cubic phase zirconia content in the range 70 to 25 percent (by volume) and a metal oxide additive which forms an insoluble zirconate, and a microstructure in the form of grains of stabilized cubic phase zirconia containing precipitates of tetragonal phase zirconia, are produced for use at low (less than 400.degree. C.) intermediate (between 400.degree. C. and 700.degree. C.), high (700.degree. C. to 1000.degree. C.) or very high (greater than 1000.degree. C.) temperatures. The higher the temperature of use of the ceramic material, the more the tetragonal precipitates need to be transformed into monoclinic phase zirconia. The extent to which the tetragonal precipitates are transformed is controlled by the way in which a fired, pressed mixture of the ceramic components is cooled from about 1400.degree. C. to about 1000.degree. C. An "ageing" of the ceramic material may be effected by an isothermal hold, preferably at 1350.degree. C. and then at 1100.degree. C., in the course of cooling to room temperature. Alternatively the ageing may be effected after first cooling the material to below 800.degree. C.

摘要翻译： PCT No.PCT / AU83 / 00069 Sec。 371日期1984年2月1日 102（e）日期1984年2月1日PCT提交1983年5月27日PCT公布。 出版物WO83 / 04247 日期：1983年12月8日。具有立方相氧化锆含量在70〜25体积％范围内的马氏体部分稳定的氧化锆材料和形成不溶性锆酸盐的金属氧化物添加剂， 稳定的立方相氧化锆含有四方相氧化锆的析出物，在低（400℃）以下（400℃〜700℃），高（700℃〜1000℃）下使用。 ）或非常高（大于1000℃）的温度。 陶瓷材料的使用温度越高，四方晶系的析出物越多，需要转变成单相氧化锆。 四方晶系转变的程度是通过将陶瓷组分的烧制压制混合物从约1400℃冷却至约1000℃来控制的。可以实现陶瓷材料的“老化” 通过等温保持，优选在1350℃，然后在1100℃，在冷却至室温的过程中。 或者，老化可以在首先将材料冷却至低于800℃之后进行

公开(公告)号：US4579829A

公开(公告)日：1986-04-01

申请号：US680433

申请日：1984-12-11

申请人： Ronald C. Garvie

发明人： Ronald C. Garvie

IPC分类号： C04B35/48

CPC分类号： C04B35/481

摘要： A refractory material consists of a zircon matrix with zirconia particles dispersed in it. The zirconia particles comprise from 5 to 30 percent (by weight) of the material. A method of making this material involves milling zircon sand particles and zirconia particles until they have a respective predetermined particle size distribution, adding a fugitive binder, moulding a green ware, firing the green ware at a temperature in the range from 1400.degree. C. to 1800.degree. C., and furnace cooling the fired ware. Preferably the ware is held at the firing temperature for one hour.

摘要翻译： 耐火材料由分散在其中的氧化锆颗粒的锆石基体组成。 氧化锆颗粒占材料的5-30％（重量）。 制造这种材料的方法包括研磨锆石砂颗粒和氧化锆颗粒，直到它们具有相应的预定的粒度分布，添加短暂的粘合剂，模制绿色制品，在1400℃至1400℃的温度下焙烧绿色制品 1800℃，并对烧制炉进行冷却。 优选地，将器具保持在烧制温度下1小时。