Title:
IRIDIUM-NIOBIUM ALLOY HAVING IMPROVED CREEP LIFE
Document Type and Number:
Japanese Patent JP3653544
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide Ir-Nb alloy having improved creep life which is considered to be a material useful for members for use in high temperature and high stress, such as a jet engine, turbine blades and turbine vane of a gas turbine, and further a space-plane engine, etc.
SOLUTION: In the Ir-Nb alloy in which iridium (Ir) is used as a base and niobium (Nb) is added to it and precipitates with Ll2 structure are precipitated in a matrix with fcc structure in a manner to be coherent with the matrix. In this alloy, ≥1 atomic % niobium and ≥1 atomic % zirconium (Zr) are added and the sum of the additive quantities of niobium and zirconium is made to 10-20 atomic %, and further, this alloy exhibits ≥100 hr creep life at ≥1,600°C.
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Inventors:
Yoko Mitarai
Tanitsuki peak
Rouichi
Nakazawa Shizuo
Hiroshi Harada
Tanitsuki peak
Rouichi
Nakazawa Shizuo
Hiroshi Harada
Application Number:
JP2001091137A
Publication Date:
May 25, 2005
Filing Date:
March 27, 2001
Export Citation:
Assignee:
National Institute for Materials Science
International Classes:
F01D5/28; C22C5/04; (IPC1-7): C22C5/04
Domestic Patent References:
| JP2000290741A |
Other References:
御手洗容子,まてりあ,日本,社団法人日本金属学会,2001年 3月20日,40巻/3号,210-213