Abstract:
A thermal barrier coating system comprising a metal substrate, a metal bonding layer and a ceramics thermal barrier layer wherein the ceramics thermal barrier layer has a columnar structure of a stabilized zirconia containing a stabilizer or a stabilized ZrO2—HfO2 solid solution containing a stabilizer, and comprises 0.1 to 10 mol % of lanthanum oxide.
Abstract:
The present invention relates to a method for producing a porous silicon nitride sintered body having high strength and low thermal conductivity, which comprises of adding more than 10 volume % of rodlike beta-silicon nitride single crystals with a larger mean diameter than that of a silicon nitride raw powder into a mixture comprising the silicon nitride raw powder and a sintering additive, preparing a formed body with rodlike beta-silicon nitride single crystals oriented parallel to the casting plane according to a forming technique such as sheet casting and extrusion forming, sintering said formed body to develop elongated silicon nitride grains from the added rodlike beta-silicon nitride single crystals as nuclei and obtain the sintered body with the elongated grains being dispersed in a complicated state.
Abstract:
A thermal barrier coating system comprising a metal substrate, a metal bonding layer and a ceramics thermal barrier layer wherein the ceramics thermal barrier layer has a columnar structure of a stabilized zirconia containing a stabilizer or a stabilized ZrO2—HfO2 solid solution containing a stabilizer, and comprises 0.1 to 10 mol % of lanthanum oxide.
Abstract translation:一种隔热涂层系统,包括金属基底,金属结合层和陶瓷热障层,其中所述陶瓷热障层具有包含稳定剂或稳定的ZrO 2 - 的稳定的氧化锆的柱状结构, 含有稳定剂的HfO 2 H 2固溶体,并含有0.1〜10mol%的氧化镧。
Abstract:
A thermal barrier coating system comprising a metal substrate, a metal bonding layer and a ceramics thermal barrier layer wherein the ceramics thermal barrier layer has a columnar structure of a stabilized zirconia containing a stabilizer or a stabilized ZrO2—HfO2 solid solution containing a stabilizer, and comprises 0.1 to 10 mol % of lanthanum oxide.
Abstract translation:一种隔热涂层系统,包括金属基底,金属结合层和陶瓷热障层,其中所述陶瓷热障层具有包含稳定剂或稳定的ZrO 2 - 的稳定的氧化锆的柱状结构, 含有稳定剂的HfO 2 H 2固溶体,并含有0.1〜10mol%的氧化镧。
Abstract:
An object of the present invention is to provide a high-porosity, high-strength porous silicon nitride having great tolerance with respect to strain and stress, and a method for producing the same, and the present invention relates to a high-porosity, high-strength porous silicon nitride having great tolerance with respect to strain and stress, characterized in that rodlike grains of silicon nitride with a minor diameter of 0.5 to 10 .mu.m and an aspect ratio of 10 to 100 are oriented in a single direction, and the rest of the structure other than the rodlike grains consists solely of pores with a porosity of 5 to 30%, and further the above-mentioned porous silicon nitride is produced by mixing rodlike particles of silicon nitride with a minor diameter of 0.5 to 10 .mu.m and an aspect ratio of 10 to 100 as the silicon nitride with an auxiliary that serves to bind the rodlike particles, forming a tape in which the silicon nitride rodlike particles are oriented in a single direction by sheet forming, extrusion forming, or another such forming process, and sintering this product in a nitrogen atmosphere after lamination and degreasing of it.
Abstract:
The present invention relates to a silicon nitride sintered body having a remarkably increased strain-to-fracture, a low elasticity and high strength, characterized by consisting of a layered structure of alternating porous silicon nitride layers 1 to 1000 .mu.m thick with a porosity of 5 to 70 volume % and dense silicon nitride layers 1 to 1000 .mu.m thick with a porosity of less than 5 volume %, being layered as materials with optional tiers. In addition, this invention relates to a method for producing the silicon nitride sintered body as described above, which comprises of forming dense layers and porous layers by sheet casting or extrusion forming so as to prepare the layers to be capable of 1 to 1000 .mu.m thick after sintering, stacking them to obtain layered materials with optional tiers and sintering them at 1600.degree. to 2100 .degree. C. under a nitrogen atmosphere.