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Article
Synthesis and nitrogen stability of ultrafine titanium carbonitride particles
The ultrafine titanium carbonitride particles (TiC0.5N0.5) with 100 nm in mean size was successfully synthesized by nitridation treatment at ordinary temperatures, 1373∼1473 K of the nanostructured half-stoichiom...
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Article
Effects of copper addition on the sintering behavior and mechanical properties of powder processed Al/SiC p composites
The effect of copper addition on powder processed Al-10 vol% SiC composites was studied in regards to their sintering responses. Copper was mixed with aluminum powder either as elemental powders or as the coat...
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Article
Hot consolidation of mechanically alloyed nanocrystalline powd in Ni-, Fe- and Mo-Based systems
The sinterability and hot-pressing behavior of mechanically milled metastable powders with nanocrystalline structures were examined in Ni-, Fe- and Mo-based systems. The nanocrystalline powders exhibited a poo...
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Article
Formation mechanism of Y2BaCuO5 pattern in growing YBa2Cu3Oxgrains during melt-infiltration process
When a melt of BaO and CuO mixture was infiltrated into sintered Y2BaCuO5(211) compact to form YBa2Cu3Ox(123) superconductor, butterfly-like plane patterns of 211-free regions were observed to form within growing...
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Chapter and Conference Paper
Fabrication and Properties of Ultra Fine MgO Added Bi-2223/MgO/Ag Tapes
The effect of inert second phase on microstructural development and the superconducting properties has been studied in order to increase Jc under magnetic field. Our previous results showed that ultra fine MgO...
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Chapter and Conference Paper
Effect of Various Sheath Alloys for Powder-in-Tube Processed Bi-2223/Ag Tapes
For various applications of HTS wires, the properties of sheath materials should be modified for certain purpose by alloying. For the application of the high field superconducting magnets, mechanical strength ...
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Chapter and Conference Paper
Enhancement in Critical Current Density of Bi-2212/Ag Composite Tape Prepared by Screen Printing and Melt Growth
High Jc Bi-2212/Ag composite tape has been fabricated using screen printing followed by partial melting and slow cooling process.
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Chapter and Conference Paper
Study on the Low-Temperature Melt Growth for Y-123 Superconductor
The low-temperature melt growth of YBa2Cu3O7−x on Ag substrate has been investigated via Y2BaCuO5 + Liq.(3 BaCuO2 + 2CuO) → 2 YBa2Cu3O7−x reaction under N2 atmosphere, using high-energy ball milled powders. The r...
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Chapter and Conference Paper
Enhanced Melt Growth of YBa2Cu3O7-δ Superconductor by High-Energy Ball Milling
The high-energy ball milling of Y1-2-3, Y2O3, or Y2-1-1 powders was investigated to see the effect of refined and highly energized powders on melt growth of Y1-2-3 superconductor. The use of highly ball-milled pa...
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Article
Combined processing of YBa2Cu3O7-δ superconducting wire by mechanical work and melt growth technique
The combination of mechanical work by powder-in-tube processing and melt growth of YBa2Cu3O7-δ was investigated. During the heat treatment of Ag-sheathed YBa2Cu3O7-δ wire above the melting point of Ag, the sheath...
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Chapter and Conference Paper
Beneficial Effect of Using 211 for the Formation of 123 Superconducting Phase
Seversal studies demonstrated that slow solidification of partially melted YBa2 Cu3 Ox (123) can produce highly oriented, long grains which yield high critical current density (Jc). The present work shows that th...
