Published March 2018 | Version v1
Journal article Metadata-only

Unusual effects of manual grinding and subsequent annealing process observed in Gd5.09Ge2.03Si1.88 compound

Creators

  • 1. UEM, Departamento de Engenharia Mecanica, Maringa, PR (Brazil)
  • 2. Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Laboratorio Nacional de Luz Sincrotron (LNLS), Campinas, SP (Brazil)
  • 3. UFMA, Centro de Ciencias Sociais, Saude e Tecnologia, Imperatriz, MA (Brazil)
  • 4. UNIFESP, Departamento de Ciencias Exatas e da Terra, Diadema, SP (Brazil)
  • 5. UNICAMP, Instituto de Fisica Gleb Wataghin, Campinas, SP (Brazil)

Description

The Gd5.09Ge2.03Si1.88 compound, as well as other magnetocaloric materials, certainly will not be used in their un-manufactured as-cast condition in future magnetic refrigeration applications or other devices. In this work, we have studied the Gd5.09Ge2.03Si1.88 compound processed in different ways, mainly, the as-cast powder, the annealed powder, and the pressed and sintered powder. The annealed powder (1370 K/20 h) does not present the monoclinic phase and the first-order magneto-structural transition observed in the as-cast powder. The pressed and sintered powder also do not present the first-order transition. Furthermore, the compacting pressure shifts the second-order magnetic transition to lower temperatures. The behavior of cell parameters as a function of the compacting pressure indicates that TC is directly affected by parameter c change. (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1007/s00339-018-1690-6

Additional details

Identifiers

DOI
10.1007/s00339-018-1690-6;

Publishing Information

Journal Title
Applied Physics. A, Materials Science and Processing
Journal Volume
124
Journal Issue
3
Journal Page Range
p. 1-5
ISSN
0947-8396
CODEN
APAMFC

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
49054453
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ANNEALING; CURIE POINT; FERROMAGNETISM; GADOLINIUM SILICIDES; GERMANIDES; GRINDING; HEXAGONAL LATTICES; LATTICE PARAMETERS; MAGNETIZATION; ORTHORHOMBIC LATTICES; PARAMAGNETISM; PHASE TRANSFORMATIONS; POWDERS; SINTERED MATERIALS; SPACE GROUPS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; X-RAY DIFFRACTION
Descriptors DEC
COHERENT SCATTERING; COMMINUTION; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIFFRACTION; GADOLINIUM COMPOUNDS; GERMANIUM COMPOUNDS; HEAT TREATMENTS; MACHINING; MAGNETISM; MATERIALS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SCATTERING; SILICIDES; SILICON COMPOUNDS; SYMMETRY GROUPS; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; THREE-DIMENSIONAL LATTICES; TRANSITION TEMPERATURE