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Brazed divertor mock-up outperformed HIP-bonded one in testing

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Research area:chemistry-materialsmaterials-science

What the study found

The study found that a divertor mock-up made with "casting + HIP" + EW + VB performed better than one made with "casting + HIP" + EW + HIP in high heat flux tests. The abstract also states that the divertor's ability to remove 20 MW/m2 for 1000 cycles has been verified.

Why the authors say this matters

The authors conclude that the "casting + HIP" + EW + VB fabrication method is very promising for use in divertors for other fusion devices or reactors. They present bonding quality as important because it directly affects operational performance and lifespan.

What the researchers tested

The researchers compared two divertor mock-ups that differed only in the bonding method used at the interface between an intermediate copper layer and an oxide dispersion strengthened copper heat sink. One mock-up was made with hot isostatic pressing (HIP), and the other was bonded via brazing, then both were evaluated through high heat flux testing for heat transfer, thermal fatigue resistance, and overall reliability.

What worked and what didn't

The high heat flux test results indicate that the divertor fabricated by "casting + HIP" + EW + VB performed better than the one made by "casting + HIP" + EW + HIP. The abstract does not provide detailed numerical comparisons for the two fabrication methods beyond this stated performance difference.

What to keep in mind

The comparison was limited to two mock-ups that differed only in the bonding method at one specific interface. The abstract does not describe detailed limitations, and it does not provide the full test conditions or broader statistical analysis.

Key points

  • The study compared two divertor mock-ups with different interface bonding methods.
  • "Casting + HIP" + EW + VB performed better than "casting + HIP" + EW + HIP in high heat flux tests.
  • The abstract says the divertor's ability to remove 20 MW/m2 for 1000 cycles was verified.
  • The authors say the VB-based fabrication method is very promising for other fusion devices or reactors.
  • Bonding quality is described as important for operational performance and lifespan.

Disclosure

Research title:
Brazed divertor mock-up outperformed HIP-bonded one in testing
Authors:
Nanyu Mou, Mingchi Feng, Shuai Huang, Jia Zheng, Le Han, Damao Yao
Institutions:
Chinese Academy of Sciences, Chinese Academy of Sciences, Chongqing University of Posts and Telecommunications, Chongqing University of Posts and Telecommunications, Chongqing University of Posts and Telecommunications, Chongqing University of Posts and Telecommunications, Hefei Institutes of Physical Science, Hefei Institutes of Physical Science, Institute of Plasma Physics, Institute of Plasma Physics
Publication date:
2026-04-02
DOI:
10.1016/j.nme.2026.102113
OpenAlex record:
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AI provenance: This post was generated by gpt-5.4-mini (OpenAI). The original authors did not write or review this post.

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