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Preparation of nanostructured high-temperature TZM alloy by mechanical alloying and sintering

Ahmadi, E ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijrmhm.2010.09.003
  3. Abstract:
  4. Mechanical milling proceeded by sintering was used to synthesize nanostructured temperature-resistant TZM alloy. Milling under Ar for different times (1, 2, 3, 5, 10, 15, 20, 25, and 30 h) and sintering at 1500, 1600 and 1700 °C for 30, 45, 60 and 90 min resulted in increasing of low-energy grain boundaries (LEGBs) and dispersion of TiC and ZrC with a size of ~ 65 nm in the matrix near LEGBs. Morphology and grain size of the products were determined from scanning electron microscope (SEM) images and X-ray diffraction (XRD) patterns, almost precisely. Optimum density of nanostructured TZM alloy ~ 9.95 ± 0.01 g/cm 3 was achieved by sintering at 1700 °C for 90 min
  5. Keywords:
  6. Mechanical alloying ; Nanostructure ; Sintering ; TZM ; Grain size ; High temperature ; Low energies ; Matrix ; Mechanical milling ; Nano-structured ; Optimum density ; Scanning electron microscopes ; Temperature resistant ; TZM alloy ; Alloys ; Grain boundaries ; Grain size and shape ; Metallurgy ; Milling (machining) ; Nanostructures ; Scanning electron microscopy ; Titanium carbide ; X ray diffraction ; Zirconium compounds
  7. Source: International Journal of Refractory Metals and Hard Materials ; Volume 29, Issue 1 , 2011 , Pages 141-145 ; 02634368 (ISSN)
  8. URL: http://www.sciencedirect.com/science/article/pii/S0263436810001265