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Structural and Microstructural Function of Protium

Structural and Microstructural Function of Protium
氕的结构和微观结构功能
批准号:
10148101
负责人:
AOKI Kiyoshi
金额:
$81.28万
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research on Priority Areas (A)
财政年份:
1998
资助国家:
日本
项目状态:
已结题
起止时间:
1998 至 2001

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中文摘要
翻译
C15 Lavase TbFe_2加热在氢大气层中结构变化的压力依赖性已使用PDSC、XRD、DSC和氢分析仪进行了研究。在水晶林状态、氢诱导性淀粉化(HIA)中的氢吸收、TbH_2的制备和残留的淀粉酸的分解-Fe和TbH_2的异常异常,具有高于0.5 MPa H_2的温度,对加热率的依赖。HIA and precipitation of TbH_2 occurred simultaneously in 0.2 MPa H_2 (O.33 K/s) and in 0.1 MPa H_2 (0.17 K/s)。在相反的、氢吸收的水晶素c-TbFe_2 H_<3.5>直接分解到O.1MPa H_2 (O.33 K/s)中的Fe和TbH_2。因此,没有反常的相位是在较低的氢压力下形成的,在较高的热度下形成的。这是为什么HIA发生在关键的氢压力上,而在关键的加热率以下,则是根据在晶体管状态下吸收氢含量的基础进行讨论的。(二)形成 ... More 在Cr-H、Mn-H、Ni-H和Nb-H合金中研究了氢诱导的超丰度真空,其能源和结构依赖性已被浓缩。3)对Sm_2Fe_复合物的HDDR处理(P-Tcurve)的氢压力和温度之间的关系(P-Tcurve)<l7>。P-T曲线认为Sm_2Fe_compound的HDDR条件<l7>比Nd_2Fe_B compound的温度更敏感<l4>。在补充中,为了澄清Nd-Fe-B复合体中HDDR过程的动态诱导机制,父Nd_2Fe_<l4>B阶段和非比例混合体之间的晶体方向关系被调查。它可以包含在这样的条件下保留crystallographic orientation relationship中的crystallographic orientation relationship,如<111>-Fe and <111>NdH_2//<001>Nd_2Fe_B<l4>, (110)-Fe and (110)NdH_2/(lOO)<l4>Nd_2Fe_B during HDDR treatment对于anisotropy的作用很重要。4) It has been found that the tensile specimen of ultra-fine grained Ti-6 Al-4 V alloy elongates until the diameter of the tip of the broken specimen Narrowed to the size of a single crystal。植入物(牙科部分)是用超塑料成型过程在表面上制造而没有裂缝的超精细颗粒材料的。这些材料在医学工业中可能是可应用的。Less(低)
英文摘要
The pressure dependence of structural changes of C15 Laves phase TbFe_2 heated in a hydrogen atmosphere was investigated using PDSC, XRD, DSC and a hydrogen analyzer. Hydrogen absorption in the crystalline state, hydrogen-induced amorphization (HIA), precipitation of TbH_2 and decomposition of the remaining amorphous alloy into ヲチ-Fe and TbH_2 occurred exothermally with increasing temperature above 0.5 MPa H_2, independent of the heating rate. HIA and precipitation of TbH_2 occurred simultaneously in 0.2 MPa H_2 (O.33 K/s) and in 0.1 MPa H_2 (0.17 K/s). On the contrary, hydrogen absorbed crystalline c-TbFe_2H_<3.5> decomposed directly into ヲチ-Fe and TbH_2 in O.1 MPa H_2 (O.33 K/s). That is, no amorphous phase was formed at the lower hydrogen pressure and at a high heating rate. The reason why HIA occurs above the critical hydrogen pressure and below the critical heating rate was discussed on the basis of the hydrogen content absorbed in the crystalline state of The Fe _2. 2) Formation … More of hydrogen-induced superabundant vacancies has been studied in Cr-H, Mn-H, Ni-H and Nb-H alloys and its energetics and structure dependence has been elucidated. 3) The relationship between hydrogen pressure and temperature (P-Tcurve) in the HDDR treatment of the Sm_2Fe_<l7> compound was investigated. The P-T curve suggested that the HDDR condition of the Sm_2Fe_<l7> compound was more sensitive to temperature than that of the Nd_2Fe_<l4>B compound. In addition, for clarifying the mechanism of anisotropic inducement during the HDDR process in the Nd-Fe-B compound, the crystal orientation relationship between the parent Nd_2Fe_<l4>B phase and the disproportionated mixture was investigated. It can be concluded that retaining the crystallographic orientation relationship such as <111>ヲチ-Fe and <111>NdH_2// <001>Nd_2Fe_<l4>B, (110)ヲチ-Fe and (110)NdH_2//(lOO)Nd_2Fe_<l4>B during HDDR treatment is important for the inducement of anisotropy. 4) It has been found that the tensile specimen of ultra-fine grained Ti-6Al-4V alloy elongates until the diameter of the tip of the broken specimen narrowed to the size of a single crystal. The implant (dental part) was produced using the ultra-fine grained material without crack on the surface by the superplastic forming process. These materials may be applicable as biomaterials in medical industries. Less
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通讯作者:
H.Nakamura: "Enhancement of Coercivity in High Remanence HDDR Nd-Fe-B Powders"IEEE Transaction on Magnetics. 35(5). 3274-3276 (1999)
H.Nakamura:“高剩磁 HDDR Nd-Fe-B 粉末中矫顽力的增强”IEEE 磁学学报。
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通讯作者:
K.Hashi: "Hydrogen absorption and desorption in Ti-Al alloys"Metals and Materials International. 7. 175-179 (2001)
K.Hashi:“钛铝合金中的氢吸收和解吸”金属与材料国际。
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通讯作者:
K.Hashi: "Hydrogen-induced amorphization in bcc-Ti-Al-Zr compounds"Scripta Materialia. 44. 2591-2595 (2001)
K.Hashi:“bcc-Ti-Al-Zr 化合物中的氢诱导非晶化”Scripta Materialia。
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共 61 条
    Alloy designs and microstructural control for multi-phase hydrogen permeation alloys with large resistance to hydrogen embrittlement
    • 批准号:
      18206072
    • 项目类别:
      Grant-in-Aid for Scientific Research (A)
    • 资助金额:
      $32.7万
    • 财政年份:
      2006
    • 负责人:
      AOKI Kiyoshi
    • 依托单位:
    Design and microstructural control of new hydrogen permeation alloys fir hydrogen membrane reactor
    • 批准号:
      14350363
    • 项目类别:
      Grant-in-Aid for Scientific Research (B)
    • 资助金额:
      $9.54万
    • 财政年份:
      2002
    • 负责人:
      AOKI Kiyoshi
    • 依托单位:
    The analysis of neuronal mechanism of the nucleus in the midbrain related to calling behavior with sexual difference in birds
    • 批准号:
      13680879
    • 项目类别:
      Grant-in-Aid for Scientific Research (C)
    • 资助金额:
      $2.11万
    • 财政年份:
      2001
    • 负责人:
      AOKI Kiyoshi
    • 依托单位:
    Crystalline-amorphous transformations by mechanical alloying
    • 批准号:
      11650712
    • 项目类别:
      Grant-in-Aid for Scientific Research (C)
    • 资助金额:
      $2.3万
    • 财政年份:
      1999
    • 负责人:
      AOKI Kiyoshi
    • 依托单位:
    海外基金