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Title: Production of Thin Walled Mo Tubing using FBCVD

The goal of this report is to demonstrate our progress towards producing free standing Mo tubing with length up to 12” and wall thickness of 250 µm. Fabrication conditions corresponding to growth of fine grain and high purity Mo material were chosen based on previous work. We focused our effort on execution of prolonged deposition processes and optimization of the FBCVD set up. Our results demonstrated that 12” long Mo tubing can be fabricated by our process. At this point the 12” tube fractured in the middle and resulted in two pieces. Further improvement in one of the fabrication steps will eliminate this drawback. We were not able to produce a tube with 250 µm wall thickness so far. The deposition rate was intentionally kept low (5-6 µm/hr) to form material with fine grain microstructure. Therefore a ~50 hour long deposition run is required to achieve such a wall thickness value, which is quite challenging for the current manually operated FBCVD apparatus. Automation of the set-up is now underway to overcome this problem.
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
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Resource Type:
Technical Report
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
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Country of Publication:
United States
Materials Science(36); Nuclear Fuel Cycle & Fuel Materials(11) Material Science