Development of Low-Temperature Processes for High-Temperature Intermetallic Compounds and their microstructure control
高温金属间化合物低温工艺开发及其微观结构控制
基本信息
- 批准号:07555228
- 负责人:
- 金额:$ 3.9万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (A)
- 财政年份:1995
- 资助国家:日本
- 起止时间:1995 至 1997
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
(1) DIP COATING OF Nb BY USING Al-Si LIQUIDBy dipping of Nb in Si-saturated Al liquid at temperatures from 940 K to 1140 K,C40-type Nb(Si_<0.9>, Al_<0.1>)_2 layr formed at the interface on Nb. The intermetallic layr consisted of fine particles with submicrons in diameter and included Al-Si liquid between particles. The growth of Nb(Si, Al)_2 layr was rate-controlled by the dissolution-precipitation reaction at the Nb/Nb(Si, Al)_2 interface. The growth rate of Nb(Si, Al)_2 was 3 times faster than that of Mo(Si, Al)_2 in the Mo dipping.In the dipping of Nb in non-saturated Al-Si liquid at 1025 K,C40-type Nb(Si, Al)_2 formed with Al-23 mol% Si liquid. The growth rate was faster than that in the case of the saturated Al-Si liquid. Product layr by dipping Nb in Al-Si liquid with around 20 mol% Si exhibited the layr-by-layr structure consisting of C40-type Nb(Si, Al)_2 and D0_<22>-type Nb(Al, Si)_3. With decreasing Si content down to 5 mol% in Al-Si liquid, the product layr consisted of the … More D0_<22>-type Nb(Al, Si)_3. Their results imply that C54-type Nb(Si, Al)_2 does not exist in the Nb-Si-Al system at 1025 K.(2) MECHANISM OF DIP COATING USING Al-Si LIQUID :By dipping Mo in Si-saturated Al liquid, C40-type Mo(Si, Al)_2 layr formed on Mo. The C40-type intermetallic layr was comprised of needle-like Mo(Si, Al)_2 grains with Al-Si liquid at grain boundary. The needle-like grains grow by dissolution-precipitation process through Al-Si liquid at the interface between Mo(Si, Al)_2 and Mo.The mechanism of the growth of C40-type intermetallic layr is the dissolution-precipitation process through Al-Si liquid at the interface between Mo or Nb and the product layr. The difference of grain shape on Mo(Si, Al)_2 and Nb(Si, Al)_2 is discussed with the phase relation and supply and consumption of Al and Si from the liquid phase in the interface. The formation of the layr-by-layr structure in the Nb dipping was explained by the consumption of Al and Si with different ratios for D0_<22> and C40.(3) DEVELOPMENT OF CRACK=FREE COATING BY DIPPING USING Al-Si LIQUIDAddition of Cr, Nb, Ta and Ti in Al-Si liquid was carried out in order to prevent the formation of cracks of Mo(Si, Al)_2 layr on Mo surface with large curvature. The dipping of MO into Al-Si-Cr liquid leads to the formation of the crack-free layr. In the dipping with Al-Si-Cr liquid, (Cr, Mo) (Si, Al)_2 grains formed on the Mo(Si, Al)_2 layr. There is no change ofthe chemical composition and the growth rate of Mo(Si, Al)_2 by addition of Cr in Al-Si liquid.(4) LIQUID-PHASE REACTIVE SINTERING OF Mo-Si-Al POWDER MIXTURELiquid-phase reactive sintering of Mo-Si-Al powdr mixture were investigated. In the powder mixture with high Al content, self-propagation reaction occurred and Mo(Si, Al)_2 formed. The sintered bodies have porous structure. Less
(1)用Al-Si合金浸镀Nb在940 - 1140 K温度下,在Si饱和的Al液中浸镀Nb,在Nb/Si界面上形成了C_(40)型Nb(Si_<0.9>,Al_<0.1>)_2层。金属间化合物层由亚微米级的细小颗粒组成,颗粒间含有Al-Si液相。Nb(Si,Al)_2层的生长受Nb/Nb(Si,Al)_2界面溶解-沉淀反应的速率控制。Nb(Si,Al)_2在1025 K时,在Al-23mol%Si液中形成C40型Nb(Si,Al)_2;生长速率比饱和Al-Si液中的生长速率快。在含Si约20mol%的Al-Si液中浸渍Nb,所得产物层由C40型Nb(Si,Al)2和D 0<22>型Nb(Al,Si)3组成。当Al-Si液中Si含量降至5mol%时,产物层由 ...更多信息 D 0型<22>Nb(Al,Si)_3。结果表明,1025 K时Nb-Si-Al系中不存在C_(54)型Nb(Si,Al)_2。(2)Al-Si液浸镀机理:在Si饱和的Al液中浸镀Mo,在Mo表面形成C_(40)型Mo(Si,Al)_2层。C_(40)型金属间化合物层由针状Mo(Si,Al)_2晶粒组成,晶界处存在Al-Si液相。在Mo(Si,Al)_2/Mo界面处,针状晶粒通过Al-Si液相的溶解-沉淀过程生长,C40型金属间化合物层的生长机制是在Mo或Nb与产物层界面处通过Al-Si液相的溶解-沉淀过程。从界面液相Al、Si的相关系和供、耗关系讨论了Mo(Si,Al)_2和Nb(Si,Al)_2晶粒形状的差异。在浸铌过程中,逐层结构的形成是由于Al和Si以不同比例消耗D 0_<22>和C40所致。(3)在Al-Si液中添加Cr、Nb、Ta和Ti,以防止Mo(Si,Al)_2层在大曲率Mo表面上产生裂纹。MO浸入Al-Si-Cr液体中导致无裂纹层的形成。在Al-Si-Cr液中,(Cr,Mo)(Si,Al)_2晶粒在Mo(Si,Al)_2层上形成。在Al-Si液中加入Cr后,Mo(Si,Al)_2的化学成分和生长速率没有变化。(4)Mo-Si-Al粉末混合物的液相反应烧结研究了Mo-Si-Al粉末混合物的液相反应烧结。在高Al含量的混合粉末中,发生自蔓延反应,生成Mo(Si,Al)_2。烧结体具有多孔结构。少
项目成果
期刊论文数量(6)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
鎌田 弘之: "MoとAl-Si-X融体(X=Cr,Nb,Ta,Ti)との反応により生成するMo(Si,Al)2の組織とその制御" 1998年春期(第121回)大会日本金属学会講演概要. (1998)
Hiroyuki Kamata:“Mo和Al-Si-X熔体反应形成的Mo(Si,Al)2的结构和控制(X=Cr,Nb,Ta,Ti)”1998年春季(第121次会议))会议摘要日本金属研究所讲座(1998)。
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- 影响因子:0
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南口 誠: "Si飽和Al融体中のNbおよびMo上に生成したダイシリサイドの微細組織" 1996年秋期(第121回)大会日本金属学会講演概要. 396- (1997)
Makoto Minamiguchi:“硅饱和铝熔体中 Nb 和 Mo 上形成的二硅化物的微观结构”日本金属学会 1996 年秋季(第 121 届)会议的演讲摘要 396-(1997 年)。
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- 影响因子:0
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M.Nanko: "Microstructure of Disilicides Formed on Nb or Mo in Si saturated Al Liquid" Abst.1996 Fall Meeting of Japan Institute of Metals. 396 (1996)
M.Nanko:“硅饱和铝液中 Nb 或 Mo 上形成的二硅化物的微观结构”Abst.1996 年日本金属学会秋季会议。
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- 影响因子:0
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高橋明男: "Si飽和Al融体を用いた超高温金属間化合物の合成" 1996年春期(第118回)大会日本金属学会講演概要. 90 (1996)
Akio Takahashi:“使用硅饱和铝熔体合成超高温金属间化合物”1996 年春季(第 118 届)日本金属学会会议摘要 90(1996)。
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- 影响因子:0
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M. Nanko: "Formation of Intermetallic Compounds on Refractory Metals in Aluminum-Silicon Liquid" Abst.of the 3rd Okinaga Symp.Mater.Sci.Eng.Serving Soc.46- (1997)
M. Nanko:“在铝硅液体中难熔金属上形成金属间化合物” Abst.of the 3rd Okinaga Symp.Mater.Sci.Eng.Serving Soc.46- (1997)
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- 影响因子:0
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MARUYAMA Toshio其他文献
MARUYAMA Toshio的其他文献
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{{ truncateString('MARUYAMA Toshio', 18)}}的其他基金
The steam oxidation mechanism of heat resistant alloys and efficiency improvement of energy conversion processes at high temperature
耐热合金的蒸汽氧化机理及高温下能量转换过程的效率提升
- 批准号:
21246108 - 财政年份:2009
- 资助金额:
$ 3.9万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Thermodynamic and Kinetic Stability of Nano-Structure in Ionic Materials and Its Control
离子材料纳米结构的热力学和动力学稳定性及其控制
- 批准号:
16079206 - 财政年份:2004
- 资助金额:
$ 3.9万 - 项目类别:
Grant-in-Aid for Scientific Research on Priority Areas
Control of non-equilibrium microstructure and function of oxide scales formed in high temperature oxidation of metalic materials for high efficiency energy comversion
控制金属材料高温氧化过程中形成的氧化皮的非平衡微观结构和功能,实现高效能量转换
- 批准号:
16360361 - 财政年份:2004
- 资助金额:
$ 3.9万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Mass Transport and Thermodynamics at the Interface in the High-Temperature Metal/Ceramics Composites
高温金属/陶瓷复合材料界面的传质和热力学
- 批准号:
09450267 - 财政年份:1997
- 资助金额:
$ 3.9万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
PHYSICAL CHEMISTRY AND MASS TRANSPORT ALONG INTERFACES IN CERAMICS
陶瓷中的物理化学和沿界面的传质
- 批准号:
08355011 - 财政年份:1996
- 资助金额:
$ 3.9万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Formation of Protective Oxide Scale with High Electrical Conductivity by High Temperature Oxidation of Alloys.
合金高温氧化形成高导电率的保护性氧化皮。
- 批准号:
06453084 - 财政年份:1994
- 资助金额:
$ 3.9万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
Modification of Refractory Metals by CVD and Its High Temperatutre Oxidation Resistance
难熔金属的CVD改性及其高温抗氧化性能
- 批准号:
01470062 - 财政年份:1989
- 资助金额:
$ 3.9万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)