Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Effect of Hot Isostatic Pressing on the Microstructure and Properties of Kinetic Sprayed Nb Coating Material

Kinetic Spray 공정으로 제조된 Nb 코팅 소재의 미세조직 및 물성에 미치는 열간 등압 성형(HIP)의 영향

  • Lee, Ji-Hye (School of Advanced Materials Engineering, Andong National University) ;
  • Yang, Sangsun (Korea Institute of Materials Science (KIMS)) ;
  • Lee, Kee-Ahn (School of Advanced Materials Engineering, Andong National University)
  • 이지혜 (국립 안동대학교 신소재공학부) ;
  • 양상선 (한국기계연구원 부설 재료연구소) ;
  • 이기안 (국립 안동대학교 신소재공학부)
  • Received : 2016.01.23
  • Accepted : 2016.02.03
  • Published : 2016.02.28
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Abstract

Niobium is one of the most important and rarest metals, and is used in the electronic and energy industries. However, it's extremely high melting point and oxygen affinity limits the manufacture of Nb coating materials. Here, a Nb coating material is manufactured using a kinetic spray process followed by hot isotactic pressing to improve its properties. OM (optical microscope), XRD (X-ray diffraction), SEM (scanning electron microscopy), and Vickers hardness and EPMA (electron probe micro analyzer) tests are employed to investigate the macroscopic properties of the manufactured Nb materials. The powder used to manufacture the material has angular-shaped particles with an average particle size of $23.8{\mu}m$. The porosity and hardness of the manufactured Nb material are 0.18% and 221 Hv, respectively. Additional HIP is applied to the manufactured Nb material for 4 h under an Ar atmosphere after which the porosity decreases to 0.08% and the hardness increases to 253 Hv. Phase analysis after the HIP shows the presence of only pure Nb. The study also discusses the possibility of using the manufactured Nb material as a sputtering target.

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