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Microstructure Formation in Al-Bi-Co Immiscible Alloys Directionally Solidified with Different Melt Superheat Temperatures

The directional solidification has been carried out for the Al-4Bi-2.5Co (wt pct) alloys with different melt superheat temperatures. The microstructure characterization and the quantitative metallographic analysis have been performed. The results indicated that the Bi-rich sphere size and cellular s...

关键词: Immiscible alloys , Directional solidification , Melt superheat , Solidification interface

表面取向对IC-6合金高温氧化的影响

袁福河 , 李铁藩 , 陈江

中国腐蚀与防护学报

采用TGA、EDAX及XRD等研究了定向凝固IC-6合金表面取向对其等温、循环氧化行为的影响.发现平行于凝固方向的纵切样品在950℃及1050℃下经100小时的等温氧化速率均明显大于横切样品的.这与横切样品表面存在品界,有利于铝的短路扩散有关。相反,由于Al_2O_3膜比较容易剥落,使横切样品表面在...

关键词: IC-6合金 , Oxidation , Surface orientation , Directional solidification , Grain boundary

离子注入Y~+对Ni30Cr定向凝固合金氧化行为的影响

辛丽 , 周龙江 , 李美栓 , 李铁藩

中国腐蚀与防护学报

利用热重分析(TGA)、扫描电镜、能谱分析、电子探针及X射线衍射等技术研究了离子注入1×10~17Y~+/cm~2对Ni30Cr定向凝固合金1000℃恒温氧化行为的影响。合金的横向和纵向虽具有不同的显微结构,但氧化行为相似。注入Y~+降低了合金的氧化速率约1～2倍,细化了氧化膜晶粒,抑制了晶界优先氧...

关键词: 氧化 , Ion implantation , Yttrium , Ni-Cr alloy , Directional solidification

Solidification Studies of 3003 Aluminium Alloys with Cu and Zr Additions

Majed M.R. Jaradeh , Torbjorn Carlbergy

材料科学技术（英文）

The effects of Cu and Zr additions, on the microstructure formation, precipitation and ingot cracking, in commercial 3003 Al alloys have been studied. The investigation was carried out by characterizing the grain structure in DC-cast rolling ingots, and studying the solidification microstructure of ...

关键词: Aluminium 3003 , null , null , null , null , null , null , null

Mechanical Properties of the TaSi₂ Fibers by Nanoindentation

Chunjuan Cui Jun Zhang Lin Liu Hengzhi Fu

材料科学技术（英文）

The Si-TaSi₂ eutectic in situ composite, which has highly-aligned and uniformly-distributed TaSi₂ fibers in the Si matrix, can be obtained when the solidification rate changes from 0.3 to 9.0 mm/min. It is very interesting that one or two TaSi₂ fibers are curved when...

关键词: Si-TaSi₂ eutectic in situ composite , null , null , null

Formation of Re-containing Carbides in a Second Generation Directionally Solidi¯ed Ni Base Superalloy

Tan Zhao , Dong Wang , Jian Zhang , Guang Chen , Langhong Lou

材料科学技术（英文）

The precipitates at grain boundary in a directionally solidified Ni base superalloy after heat treatment, aging at 975°C, and creep rupture test have been characterized. Besides the primary MC carbides and fine particles of μ phase, the Re-containing M₂₃C_...

关键词: Ni-base Superalloys , null , null , null

Effect of Re Addition and Withdrawal Rate on the Solidification Behavior of Directionally Solidified Superalloy AM3

F. Long

材料科学技术（英文）

The influence of Re addition and withdrawal rate on the solidification behavior of the first generation single crystal superalloy AM3 was investigated by directional solidification and quenching experiments. The primary dendrite arm spacing and eutectic volume fraction were measured from directional...

关键词: Superalloy AM3 , null , null

材料期刊网

Microstructure Formation in Al-Bi-Co Immiscible Alloys Directionally Solidified with Different Melt Superheat Temperatures

表面取向对IC-6合金高温氧化的影响

离子注入Y~+对Ni30Cr定向凝固合金氧化行为的影响

Solidification Studies of 3003 Aluminium Alloys with Cu and Zr Additions

Mechanical Properties of the TaSi₂ Fibers by Nanoindentation

Formation of Re-containing Carbides in a Second Generation Directionally Solidi¯ed Ni Base Superalloy

Effect of Re Addition and Withdrawal Rate on the Solidification Behavior of Directionally Solidified Superalloy AM3

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