Fabrication of Intermetallic Compounds New Material by SHS Combustion Process.

SHS燃烧工艺制备金属间化合物新材料。

基本信息

项目摘要

The combustion synthesis of dense TiAl intermetallic compound with Ni/Al and Co/Al sintering additive was investigated. The raw Ti/Al(Ti : Al=1 : 1) powder mixed with Ni/Al (Ni : Al= 1 : 1) or Co/Al (Co : Al=1 : 1) was prepared form elemental Ti, Al, Ni, and Co powders. The compacts made from the powders were reacted by the thermal explosion combustion synthesis. After this, density, phases, microstructure, and mechanical properties were measured.The products by combustion synthesis tend to be porous, HP and HIP treatment were required to obtained dense material. However, the nearly full dense product could be obtained by moderate addition of the sintering additive. In the TiAl combustion synthesis, the liquid quantity was insufficient to promote the densification and too small heat of formation would result in the poor densification. Therefore, the Ni/Al or Co/Al powders were mixed into the Ti/Al powder as the sintering additive.When the synthesizing additive was added to Ti/Al powder, the product density reached more than 97%. The products consisted of TiAl, Ti_3Al and solidified liquid phase with the grain size of about 25μm. Vickers hardness and compressive strength of the products were compared to those of the TiAl produced by the fusion process. The synthesis condition for the dense TiAl intermetallic compound by the combustion synthesis route could be determined in this study.
研究了Ni/Al和Co/Al烧结添加剂燃烧合成致密TiAl金属间化合物的方法。将Ti/Al(Ti: Al= 1:1)与Ni/Al (Ni: Al= 1:1)或Co/Al (Co: Al= 1:1)混合制备成单质Ti、Al、Ni和Co粉末。采用热爆燃烧合成法制备了压实剂。在此之后,测量了密度、相、显微组织和力学性能。燃烧合成产物易多孔,需要HP和HIP处理才能得到致密的材料。适量添加烧结添加剂可获得接近全致密的烧结产物。在TiAl燃烧合成中,液体量不足以促进致密化,生成热过小导致致密化不良。因此,将Ni/Al或Co/Al粉末混合到Ti/Al粉末中作为烧结添加剂。将合成添加剂添加到Ti/Al粉末中,产物密度达到97%以上。产物由TiAl、Ti_3Al和凝固液相组成,晶粒尺寸约为25μm。并与熔合生产的TiAl进行了维氏硬度和抗压强度的比较。本研究确定了燃烧合成路线合成致密TiAl金属间化合物的条件。

项目成果

期刊论文数量(14)
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Atsushi Hibino: "Numerical Equations for Analyzing the Process of Combustion Synthesis of Ni-Al Intermetallic Compounds" International Journal of Self-Propagating High-Temperature Synthesis. 8-1(校閲了発表予定). (1999)
Atsushi Hibino:“Ni-Al 金属间化合物燃烧合成过程的数值方程”,国际自蔓延高温合成杂志 8-1(编辑并待出版)。
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A.Hibino S.Matsuoka,M.Kiuchi: "Synthesis and Sintering of Ni3Al Intermetallic Compound by Combustion Synthesis Process"J.of Mater.Process.Tech.. (in press). (2001)
A.Hibino S.Matsuoka、M.Kiuchi:“通过燃烧合成法合成和烧结 Ni3Al 金属间化合物”J.of Mater.Process.Tech..(出版中)。
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A.Hibino, S.Matsuoka, M.Kiuchi: "Synthesis and Sintering of Ni_3Al Intermetallic Compound by Combustion Synthesis Process"J.of Mater.Process.Tech.. (in press). (2001)
A.Hibino、S.Matsuoka、M.Kiuchi:“通过燃烧合成法合成和烧结 Ni_3Al 金属间化合物”J.of Mater.Process.Tech..(出版中)。
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A.HIbino: "Numerical Equations for Analyzing the process of Combustion Synthesis of Ni-Al Intermetallic Compound"Intern.J.of Self Propagating High Temperature Synthesis. 8. 13-29 (1999)
A.HIbino:“Ni-Al金属间化合物燃烧合成过程分析的数值方程”Intern.J.of Self Propagating高温合成。
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日比野敦,松岡信一: "無加圧燃焼合成によるTiAl比に及ぼすTi/Al比の影響"第7回機械材料・材料加工・技術講演会講演論文集. 99-23. 229-230 (1999)
Atsushi Hibino,Shinichi Matsuoka:“无压燃烧合成对 Ti/Al 比率的影响”第七届机械材料、材料加工和技术会议记录 99-23(1999)。
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ATSUSHI Hibino其他文献

ATSUSHI Hibino的其他文献

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