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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Bulk Glass Formation in Eutectic of La-Cu-Ni-Al Metallic Alloys

Zhang, Yong, Tan, Hao, Li, Yi 01 1900 (has links)
A eutectic in La-rich La-Cu₀.₅Ni₀.₅-Al alloys was determined by studying the melting behaviors and the microstructure observations. The microstructures of the La-Cu-Ni-Al alloys prepared by Bridgman Solidification and copper mould casting were studied by using scanning electron microscope (SEM). The results show that La₆₆[Cu₀.₅Ni₀.₅]₂₀Al₁₄ alloy is very near to a pseudo-ternary eutectic. When the cooling rate is higher than 450 K/s, fully amorphous can be formed; when the cooling rate is within 15 K/s to 450 K/s, the alloy has a microstructure of dendrite plus amorphous, when the cooling rate is within 12 K/s to 1.5 K/s, the microstructures of the alloy are dendrite plus eutectic, and when the cooling rate is lower than 0.12 K/s, the morphology of the alloy is eutectic microstructure. The off eutectic alloy has better glass forming ability, the best glass forming alloy obtained at La₆₂[Cu₀.₅Ni₀.₅>]₂₄Al₁₄ along the composition line of La₈₆₋x[Cu₀.₅Ni₀.₅]xAl₁₄. It has a potential to form bulk metallic glassy rod samples with diameter larger than 12 mm. / Singapore-MIT Alliance (SMA)
2

O Estudo do comportamento eletroquimico do ion La sup(3+) em meio a cloretos fundidos. A formacao de LaNi sub(5)

DIAS, CRISTIANE 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:47:41Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:08:15Z (GMT). No. of bitstreams: 1 08318.pdf: 5216839 bytes, checksum: a5aa91f30daca6826d66086676357dd7 (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
3

O Estudo do comportamento eletroquimico do ion La sup(3+) em meio a cloretos fundidos. A formacao de LaNi sub(5)

DIAS, CRISTIANE 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:47:41Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:08:15Z (GMT). No. of bitstreams: 1 08318.pdf: 5216839 bytes, checksum: a5aa91f30daca6826d66086676357dd7 (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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