公开(公告)号：JP2003096525A

公开(公告)日：2003-04-03

申请号：JP2001288186

申请日：2001-09-21

Applicant: NAT INST FOR MATERIALS SCIENCE

Inventor： RO YOSHIICHI ,  MITARAI YOKO ,  HARADA KOJI ,  NAKAZAWA SHIZUO ,  SAKAUCHI HIDENORI

IPC: C22C5/04 ,  C22C19/03

Abstract: PROBLEM TO BE SOLVED: To provide a platinum-iridium alloy which has a compressive strength above that of an Ni based single crystal heat resistant alloy at 1,200 deg.C, and has sufficiently high room temperature toughness. SOLUTION: In a Pt-Ir binary alloy, the content of Ir is >0 to

公开(公告)号：JP2002146460A

公开(公告)日：2002-05-22

申请号：JP2001256449

申请日：2001-08-27

Applicant: NAT INST FOR MATERIALS SCIENCE ,  TOSHIBA CORP

Inventor： HINO TAKEHISA ,  KOIZUMI YUTAKA ,  KOBAYASHI TOSHIHARU ,  NAKAZAWA SHIZUO ,  HARADA KOJI ,  ISHIWATARI YUTAKA ,  YOSHIOKA HIROAKI

IPC: F01D5/28 ,  C22C19/05 ,  C22F1/00 ,  C22F1/10

Abstract: PROBLEM TO BE SOLVED: To obtain a nickel based single crystal superalloy having improved creep strength and structural stability in a high temperature environment, its production method and gas turbine high temperature parts. SOLUTION: This superalloy has a composition containing, by weight, 4.0 to 11.0% cobalt, 3.5 to =4.0%. Also, the total content of renium, molybdenum, tungsten and chromium is

公开(公告)号：JP2002285260A

公开(公告)日：2002-10-03

申请号：JP2001091137

申请日：2001-03-27

Applicant: NAT INST FOR MATERIALS SCIENCE

Inventor： MITARAI YOKO ,  TANI TSUKIMINE ,  RO YOSHIICHI ,  NAKAZAWA SHIZUO ,  HARADA KOJI

IPC: F01D5/28 ,  C22C5/04

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 deg.C.