Evolution of TaC morphology during directional solidification of Ni, Cr, Al-TaC in-situ composite

Jin Jiang Yu, Jun Zhang, Xiao Feng Sun, Heng Rong Guan, Heng Zhi Fu, Zhuang Qi Hu

Research output: Contribution to journalArticlepeer-review

Abstract

The Ni, Cr, Al-TaC composite was directionally cast from a nickel-base alloy with a nominal mass composition of Ni-10Cr-5. 0Al-13. 9Ta-0. 9C (mass fraction, %). The morphologies of TaC in the in-situ composite was observed with AMRAY100B SEM. TEM investigations were preformed in a JEM-2000CX instrument at 150 kV. The experimental results show that TaC fibers are grown from the dendritic arms of the primary blocky TaC in the bottom of the directionally solidified Ni, Cr, Al-TaC sample. The longitudinal growth of TaC fibers is controlled by the pyramid growth mechanism under forced heat flow of [001] orientation. The transverse growth pattern of TaC is markedly affected by the unstable mode. The multiplicity of TaC transverse morphologies is presented.

Original languageEnglish
Pages (from-to)99-103
Number of pages5
JournalTransactions of Nonferrous Metals Society of China (English Edition)
Volume15
Issue numberSPEC. ISS. 3
StatePublished - Nov 2005

Keywords

  • Composite
  • Crystal growth
  • Directional solidification
  • Fibers
  • TaC

Fingerprint

Dive into the research topics of 'Evolution of TaC morphology during directional solidification of Ni, Cr, Al-TaC in-situ composite'. Together they form a unique fingerprint.

Cite this