Development of MoSi_2 based silicides as refractory materials operating at ultra-high temperatures and severe enviroment.
开发MoSi_2基硅化物作为超高温和恶劣环境下的耐火材料。
基本信息
- 批准号:02555151
- 负责人:
- 金额:$ 6.4万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Developmental Scientific Research (B)
- 财政年份:1990
- 资助国家:日本
- 起止时间:1990 至 1991
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
As one of the candidates for ultra-high temperature materials operating at high temperatures more than 1500゚C, transition metal silicides with the Cll_b, C40 and D8_8 structures have been chosen. MoSi_2, WSI_2, CrSi_2, TaSi_2 and Ti_5Si_3 were selected among these silicides. In this work plastic deformation behavior and strengthening mechanism have been investigated and then some approach for ductility improvement have been carried out. MoSi_2. crystals can be deformed at temperatures more than 900゚C and the major mode of deformation is<331> (110) and<331> (103) slips. At higher temperatures deformation of MOSi_2 is accomplished by the activation of<100>and<110>ordinary dislocations which tend to form nodes. The ductility is remarkably improved with the activation of ordinary dislocations at temperatures above 1200゚C. The creep behaviour of these silisides has also been investigated. These silisides have high activation energy for creep and exhibit good creep resistance. From the view point of phase stability when pure stacking faults is created on (110) plane by the motion of 1/4<111>dislocation, the atomic arrangement on (110) planes in crystals with the Cll_b structure become to be identical to those on (0001) plane in crystals with the C40 structure. Therefore, formation of the stacking fault is closely related to the stability of the Cll_b-structure relative to the C40-structure. The partial replacement of Mo by Cr results in a substantial increase in the activity of the 1/4[111]superpartials separated by the stacking fault, which is expected to improve the ductility.
具有C11_B、C40和D8_8结构的过渡金属硅化物作为在超过1500 ℃的高温下工作的超高温材料的候选者之一已被选择。在这些硅化物中选择MoSi_2、WSI_2、CrSi_2、TaSi_2和Ti_5Si_3。本文研究了高强混凝土的塑性变形行为和强化机理,并提出了提高延性的途径。MoSi_2。晶体在900 ℃以上可以变形,主要变形方式为<331>(110)和<331>(103)滑移。在较高温度下,MOSi_2的变形是由位错和普通位错的激活来完成<100><110>的,这些位错倾向于形成节点。当温度高于1200 ℃时,普通位错的激活显著提高了合金的塑性。这些硅苷的蠕变行为也进行了研究。这些硅苷具有高的蠕变活化能,并表现出良好的抗蠕变性。从相位稳定性的观点来看,当1/4位错运动在(110)面上产生纯层错<111>时,具有Cll_B结构的晶体中(110)面上的原子排列变得与具有C40结构的晶体中(0001)面上的原子排列相同。因此,堆垛层错的形成与C11_b结构相对于C40结构的稳定性密切相关。用Cr部分取代Mo导致由堆垛层错分离的1/4[111]超偏晶的活性显著增加,这有望改善延展性。
项目成果
期刊论文数量(18)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Y.Umakoshi,T Nakashima T.Yamane and H.Semba: "Plastic deformation of transition metal silicides with the Cll_b and the C40 structure." JIMIS-6 on Intermetallic Compounds-Structure and Mechanical Properties- J.Jap.Inst.of Metals,. 1. 639-643 (1991)
Y.Umakoshi、T Nakashima T.Yamane 和 H.Semba:“具有 Cll_b 和 C40 结构的过渡金属硅化物的塑性变形。”
- DOI:
- 发表时间:
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- 影响因子:0
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- 通讯作者:
M.Yamaguchi and Y.Umakoshi: "The deformation behaviour of intermetallic superlattice compounds." Progress in Materials Science. 34. 1-148 (1990)
M.Yamaguchi 和 Y.Umakoshi:“金属间超晶格化合物的变形行为。”
- DOI:
- 发表时间:
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- 影响因子:0
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- 通讯作者:
Y. Umakoshi, T. Nakashima, T. Kamane and H. Semba: "Plastic deformation of transition metal silicides with the Cll_b and the C40 structure." JIMIS-6 on Intermetallic Compounds-Structure and Mechanical Properties- J. Jap. Inst. of Metals. 1. 639-643 (1991)
Y. Umakoshi、T. Nakashima、T. Kamane 和 H. Semba:“具有 Cll_b 和 C40 结构的过渡金属硅化物的塑性变形。”
- DOI:
- 发表时间:
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- 影响因子:0
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- 通讯作者:
Y. Umakoshi: "Plastic deformation of high temperature intermatallics" Bulletin of J. Jap. Inst, of Metals. 30. 72-79 (1991)
Y. Umakoshi:“高温金属间化合物的塑性变形”J. Jap 公报。
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- 影响因子:0
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- 通讯作者:
T.Hirano,M.Nakamura,K.Kimura and Y.Umakoshi: "Single crystal growth and mechanical properties of MoSi_2 and WSi_2." Proc.15th Annual Conf.on Composites and Advanced Ceramics(American Ceramic Soc.).
T.Hirano、M.Nakamura、K.Kimura 和 Y.Umakoshi:“MoSi_2 和 WSi_2 的单晶生长和机械性能”。
- DOI:
- 发表时间:
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- 影响因子:0
- 作者:
- 通讯作者:
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UMAKOSHI Yukichi其他文献
UMAKOSHI Yukichi的其他文献
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{{ truncateString('UMAKOSHI Yukichi', 18)}}的其他基金
Observation of lattice defects, deformation behavior in duplex alloys and evaluation of their lifetime using magnetic properties.
观察双相合金中的晶格缺陷、变形行为并利用磁性能评估其寿命。
- 批准号:
14205105 - 财政年份:2002
- 资助金额:
$ 6.4万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Cyclic Deformation and Fracture Behavior of L1_2-Type Intermetallic Compounds Using Magnetic Properties
利用磁性能研究 L1_2 型金属间化合物的循环变形和断裂行为
- 批准号:
12450283 - 财政年份:2000
- 资助金额:
$ 6.4万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Control of micro-structure and phase interface for concurrent design of multi-functional materials.
多功能材料并行设计的微观结构和相界面控制。
- 批准号:
11221206 - 财政年份:1999
- 资助金额:
$ 6.4万 - 项目类别:
Grant-in-Aid for Scientific Research on Priority Areas (B)
Development of NbSi_2-Based Duplex Silicides for Turbine Blade Operating at Ultra High-Temperature
超高温涡轮叶片用NbSi_2基双相硅化物的研制
- 批准号:
10555232 - 财政年份:1998
- 资助金额:
$ 6.4万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
The stability of microstructure and the fatigue deformation mechanism of duplex aluminides containing fine precipitates under cyclic loading.
循环加载下含有细小析出物的双相铝化物的显微组织稳定性及疲劳变形机制
- 批准号:
09305045 - 财政年份:1997
- 资助金额:
$ 6.4万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Development of Testing Machine for Mechanical Properties at Ultra High Temperature using Impulse Electron Irradiation
脉冲电子辐照超高温力学性能试验机的研制
- 批准号:
07555502 - 财政年份:1995
- 资助金额:
$ 6.4万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Plastic Anisotropy and Fatigue Fracture Mechanism of TiAl Alloys under Cyclic Loading.
循环加载下TiAl合金的塑性各向异性和疲劳断裂机制。
- 批准号:
07455282 - 财政年份:1995
- 资助金额:
$ 6.4万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Observation and control of the interfacial reaction of multilayr thin films for lead bonding wire using optical reflectivity technique.
利用光学反射技术观察和控制引线键合线用多层薄膜的界面反应。
- 批准号:
04452281 - 财政年份:1992
- 资助金额:
$ 6.4万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
The characteristics of impression creep test and its application to intermetallic compounds.
压印蠕变试验的特点及其在金属间化合物中的应用
- 批准号:
60550513 - 财政年份:1985
- 资助金额:
$ 6.4万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
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下一代涡轮发动机材料:金属超高温材料系统的环境和机械性能
- 批准号:
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21760525 - 财政年份:2009
- 资助金额:
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Grant-in-Aid for Young Scientists (B)
NSF-AFOSR Joint Workshop on Future Ultra-High Temperature Materials; Arlington, VA
NSF-AFOSR 未来超高温材料联合研讨会;
- 批准号:
0403004 - 财政年份:2004
- 资助金额:
$ 6.4万 - 项目类别:
Standard Grant
Grain Boundary and Interface Architecture for Ultra-High Temperature Materials -Occurrence of Super-Heat Resistance and Oxidation Resistance-
超高温材料的晶界和界面结构-抗过热性和抗氧化性的发生-
- 批准号:
10555226 - 财政年份:1998
- 资助金额:
$ 6.4万 - 项目类别:
Grant-in-Aid for Scientific Research (B).