Development of Super-Heat-Resisting IrAl Intermetallic Compound with High Strength and Good Oxidation resistance.

高强度、抗氧化性好的超耐热IrAl金属间化合物的研制。

• 批准号: 08650804
• 负责人: CHIBA Akihiko
• 金额: $ 1.41万
• 依托单位: Iwate Uninersity
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650804/
• 关键词: INTERMETALLIC COMPOUND; IrAl INTERMETALLICS; HIGH-TEMPERATURE MATERIALS

High-temperature compression test have been conducted on polycrystalline Ir_x Ni_x Alintermetallic compounds with x varying from O to 0.8. Although IrAl(x=0)fractures without exhibiting appreciable yielding at temperatures up to 873K, a steady state-like deformation in IrAl takes place at temperatures higher than range. The IrAl alby exhibits the 0.2% flow stress of 1200MPa at 1037K and 350MPa at 1473K, having negative temperature dependence of the strength. is improved with increasing x, On the contrary the strength decreases with increasing x in the intermediate temperature range. The IrAl alby exhibits the 02% flow stress of 1200MPa at 1073K and 350MPa at 1473K having negative temperature dependence of The strength. Furthermore, the specific strength of Ir1-xNl almost dose not with x=0 to 0.8 at temperatures higher than that of binary NiAl over the entire temperature range to 1473K The 0.2 flow stress Ir_<0.2>Ni_<0.8>Al is significantly higher than that of binary NiAl over the entir … More e temperature range In 1673K Creep rates for polycrystalline (Ni, Ir)A1 are about 2 orders of magnitude lower than those for polycrystalline NiAl. The increment of internal stress of (Ni, Ir)Al contributes greatly to the improvement of creep strength for NiAl. TEM observations in deformed polycrystalline (Ni, Ir)Al show the existence of dislocation network consisting of dislocations with deferent Burgers vector. Creep deformation of single crystal (Ni, Ir)Al exhibits two macroscopically deferent , odes, such as uniform deformation and kinking. We assume that the IR addition inhibits the easy slip system for NiAl and contributes to the formation of sessile dislocation in polycrystalline(Ni, Ir)Al and the phenomenon of kinking in single crystal (Ni, Ir)Al. Ir addition may inhibit the easy slip system{011|<100>for NiAl. Instead, it may facilitate {001}<010>slip system, resulting in the formation of sessile dislocations and subgrain boundary dislocation networks responsible for the high internal stress of (Ni, Ir)Al. Less

高温压缩测试已在多晶IR_X ni_x alintermentallic化合物上X变化为0.8（x = 0）。在350MPA的1473K E处的流动应力随着x的增加而增加，相反，强度在中间体中的x降低了。在温度下，在温度下，ir1-XNL的特异性在温度上几乎不高于x = 0至0.8那个超过整体…多晶的1673K蠕变速率中的E温度范围更大（Ni，IR A1的温度范围约为2个级数，降低了那些ForyCrystalline nial的降低。变形的多晶（Ni，ir）表明存在脱位的脱位脱位的脱位，例如宏观的ode，例如均匀的变形和扭结。缝合晶体（Ni）的静态themonon可能会抑制轻松的滑动系统{011 | （Ni，ir）的高内部应力的网络

项目成果

A.Chiba, T.Ono, X.G.Li and S.Takahashi: "High-Temperature Mechanical Behabior of B2 Type IrAl Doped with Ni" High-Temperature Ordered Intermetallic Alloys-VII,Proceedings of Materials Research Society, 1996 fall meeting, 460. 707-712 (1997)

A.Chiba、T.Ono、X.G.Li 和 S.Takahashi：“B2 型 IrAl 掺杂 Ni 的高温机械行为”高温有序金属间合金-VII，材料研究学会论文集，1996 年秋季会议，460。

A.Chiba et al.: "Hith-Temperature Mechanical Behabior of B2 Type IrAl Doped with Ni" High-Temperature Ordered Intermetallic Alloys-VII,Proceedings of Materials Research Society,1996 fall meeting. 460. 707-712 (1997)

A.Chiba 等人：“B2 型 IrAl 掺杂 Ni 的高温机械行为”高温有序金属间合金-VII，材料研究学会论文集，1996 年秋季会议。

T.Ono et al.: "High-Temperature Properties of B2 Type IrAl Intermetallic Compounds Doped with Ni" Mater.Trans. JIM.(in press).

T.Ono 等人：“掺杂 Ni 的 B2 型 IrAl 金属间化合物的高温性能”Mater.Trans。

A.Chiba, T.Ono, X.G.Li and S.Takahashi: "High Temperature Strength Properties of Ir Doped NiAl Intermetallic Compound" Third Pacific Rim International Conference on Advanced Materials and Processing (PRICM 3), edited by M.A.Imam, R.DeNale, S.Hanada, Z.Zho

A.Chiba、T.Ono、X.G.Li 和 S.Takahashi：“Ir 掺杂 NiAl 金属间化合物的高温强度性能”第三届环太平洋先进材料与加工国际会议 (PRICM 3)，由 M.A.Imam、R.DeNale 编辑

A.Chiba et al.: "High-Temperature Mechanical Behabior of B2 Type IrAl Doped with Ni" High-Temperature Ordered Intermetallic Alloys-VII, Proceedings of Materials Research Society, 1996 fall meeting.460. 707-712 (1997)

A.Chiba 等人：“B2 型 IrAl 掺杂 Ni 的高温机械行为”高温有序金属间合金-VII，材料研究学会论文集，1996 年秋季会议。460。