DEVELOPMENT STUDY OF HIGH-TEMPERATURE STRUCTURAL MATERIALS OF LAVES PHASE REFRACTORY ALLOYS WITH HIGH RESISTANCE TO CORROSION AND ENVIRONMENT
| Project/Area Number |
10650696
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | MIYAGI NATIONAL COLLEGE OF TECHNOLOGY |
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Principal Investigator |
YOSHIDA Mitsuhiko MIYAGI NATIONAL COLLEGE OF TECHNOLOGY, MATERIALS SCIENCE AND ENGINEERING, PROFESSOR, 教授 (40042254)
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| Co-Investigator(Kenkyū-buntansha) |
KITAGAWA Akio MIYAGI NATIONAL COLLEGE OF TECHNOLOGY, MATERIALS SCIENCE AND ENGINEERING, ASSISTANT PROFESSOR, 助教授 (90270199)
KUMAGAI Koichi MIYAGI NATIONAL COLLEGE OF TECHNOLOGY, MATERIALS SCIENCE AND ENGINEERING, LECTURER, 講師 (00205163)
MATSUURA Makoto MIYAGI NATIONAL COLLEGE OF TECHNOLOGY, MATERIALS SCIENCE AND ENGINEERING, PROFESSOR, 教授 (40042262)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥3,000,000 (Direct Cost: ¥3,000,000)
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| Keywords | intermeallic compound / high-temperature / Laves phase / phase boundary / duplex phase / eutectic path / 高温材料 / NbCr_2 / TiCr_2 / 二相組織 |
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| Research Abstract |
The phase diagram of ternary Nb-Cr-Ti alloy systema at 1350℃ are investigated by mettallography, X-ray diffraction and transmission electron microscopy equipped with energy-dispersive X-ray analysis. And also, high temperature deformability is investigated by compression test. In the composition between 5at.%Nb and 15at.%Nb in the alloy with 66.7at.%Cr-(33.3-x)at.%Ti-x at.%Nb, C36 Laves phase with dihexagonal structure is in equilibrium to C15 phase with fcc structure at a temperature of 1350℃. And Laves phase are equilibrated directly with Cr-bcc solid solution without forming any intermetallic phases. The eutectic path consisting of Laves phase and Cr-bcc solid solution lies in a composition between 75at.%Cr and 80at.%Cr in the ternary Nb-Cr-Ti alloy system. Form the experimental result of compression test, the high-temperature deformability of the alloy consisting of primary Cr-bcc solid solution and Laves phase is better than that of the alloy consisting of primary Laves phase and Cr-bcc solid solution.
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Report
(3 results)
Research Products
(5 results)
