Title:
NANO-CRYSTAL AUSTENITIC METAL BULK MATERIAL HAVING HIGH HARDNESS, HIGH STRENGTH AND TOUGHNESS , AND METHOD FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2004/029313
Kind Code:
A1
Abstract:
A nano-crystal metal bulk material which comprises an aggregate of metal nano crystal grains, wherein it further comprises an oxide, nitride, carbide, boride or the like of a metal or metalloid between the above nano crystal grains and/or inside of the grain as a substance inhibiting the growth of the crystal grain; and a method for producing the nano-crystal metal bulk material which comprises subjecting respective fine powders of the components of the nano-crystal metal bulk material to mechanical alloying (MA) by means of a ball mill or the like to prepare nano metal powders, and then subjecting the powders to a massing and forming treatment such as hot massing and forming, for example, spark plasma sintering, extruding or rolling, or explosion forming. The nano-crystal metal bulk material exhibits high hardness, high strength and toughness.
Inventors:
MIURA HARUMATSU (JP)
MIYAO NOBUAKI (JP)
OGAWA HIDENORI (JP)
ODA KAZUO (JP)
KATSUMURA MUNEHIDE (JP)
MIZUTANI MASARU (JP)
MIYAO NOBUAKI (JP)
OGAWA HIDENORI (JP)
ODA KAZUO (JP)
KATSUMURA MUNEHIDE (JP)
MIZUTANI MASARU (JP)
Application Number:
PCT/JP2003/012530
Publication Date:
April 08, 2004
Filing Date:
September 30, 2003
Export Citation:
Assignee:
NANO TECHNOLOGY INST INC (JP)
MIURA HARUMATSU (JP)
MIYAO NOBUAKI (JP)
OGAWA HIDENORI (JP)
ODA KAZUO (JP)
KATSUMURA MUNEHIDE (JP)
MIZUTANI MASARU (JP)
MIURA HARUMATSU (JP)
MIYAO NOBUAKI (JP)
OGAWA HIDENORI (JP)
ODA KAZUO (JP)
KATSUMURA MUNEHIDE (JP)
MIZUTANI MASARU (JP)
International Classes:
B22F3/00; (IPC1-7): C22C33/02; C22C1/05; B22F1/00
Foreign References:
| JPH1088289A | 1998-04-07 | |||
| JPH1143748A | 1999-02-16 | |||
| EP1234894A1 | 2002-08-28 | |||
| US4909840A | 1990-03-20 | |||
| JPH05117716A | 1993-05-14 | |||
| JP2001207202A | 2001-07-31 | |||
| JP2002206102A | 2002-07-26 |
Other References:
HARUMATSU MIURA: "Mechanical alloying ni Yori sakusei shita Kochisso Nano Kessho Austenite deno Chisso no Kyodo", CURRENT ADVANCES IN MATERIALS AND PROCESSES, vol. 15, no. 3, 2002, pages 454 - 457, XP002977418
HARUMATSU MIURA: "Mechanical alloying ni yotte sakusei shita Kochisso stainless-ko Funmatsu no Austenite-ka to koka Seikei", CURRENT ADVANCES IN MATERIALS AND PROCESSES, vol. 13, no. 3, 2000, pages 362 - 363, XP002977419
HARUMATSU MIURA: "Preparation of Nanocrystalline High-nitrogen Stainless Steel Powders by Mechanical alloying and Their HotCompaction", MATERIALS TRANSACTIONS, vol. 42, no. 11, 2001, pages 2368 - 2373, XP002977420
See also references of EP 1548138A4
HARUMATSU MIURA: "Mechanical alloying ni yotte sakusei shita Kochisso stainless-ko Funmatsu no Austenite-ka to koka Seikei", CURRENT ADVANCES IN MATERIALS AND PROCESSES, vol. 13, no. 3, 2000, pages 362 - 363, XP002977419
HARUMATSU MIURA: "Preparation of Nanocrystalline High-nitrogen Stainless Steel Powders by Mechanical alloying and Their HotCompaction", MATERIALS TRANSACTIONS, vol. 42, no. 11, 2001, pages 2368 - 2373, XP002977420
See also references of EP 1548138A4
Attorney, Agent or Firm:
Murata, Yukio (Kita-yaesu Bldg. 3rd Floor 2-11, Nihonbashi 3-Chom, Chuo-Ku Tokyo, JP)
Download PDF: