发明名称 |
VERFAHREN ZUR HERSTELLUNG VON MIT YTTRIUMOXID DISPERSIONVERFESTIGTEN REINST-PLATIN-WERKSTOFFEN, HALBZEUGEN UND BLECHEN |
摘要 |
Process for producing very pure platinum materials dispersion-reinforced with Y2O3 and having high strength and extensibility, even in the temperature range >800 DEG C., from platinum powder by mechanical alloying, which comprises the process steps preparing platinum powder of high purity and low particle size of from 2 to 10 mu m, introducing and dispersing Y2O3 particles >1 mu m in the platinum powder by milling in a platinum vessel using milling media of zirconium oxide, degassing the milled product under a vacuum of better than 10-3 mbar and with an increase in temperature to at least 1200 DEG C. in a platinum capsule for a period of up to 48 hours, gastight welding of the evacuated capsule and hot isostatic pressing at 1350 DEG C. and 200 MPa to give blocks of compact dispersion-reinforced platinum having a density of 100%, producing semi-finished parts and foils from these dispersion-reinforced platinum materials, these parts and foils having a platinum purity of at least 99.95%, a tensile strength Rm from 300 to 350 MPa, an extensibility A of 15-25% and a grain stability up to 1400 DEG C. |
申请公布号 |
AT201458(T) |
申请公布日期 |
2001.06.15 |
申请号 |
AT19950104179T |
申请日期 |
1995.03.22 |
申请人 |
SCHOTT GLAS |
发明人 |
DISAM, JOACHIM, DR.;JANGG, GERHARD, PROF. DR.;ZBIRAL, JOHANNES, DR.;SCHREIER, GERHARD, DR.;EDTMAIER, CHRISTIAN, DR. |
分类号 |
C22B11/02;B22F1/00;B22F9/04;B22F9/30;C03B5/167;C22C1/05;C22C32/00 |
主分类号 |
C22B11/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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