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This page presents an AI-generated summary of a published research paper. The original authors did not write or review this article. [See full disclosure ↓]

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Brazing performed better than HIPing in divertor tests

Materials Science research
Photo by WikiImages on Pixabay · Pixabay License
Research area:Nuclear engineeringMagnetic confinement fusion researchFusion materials and technologies

What the study found

A divertor mock-up made with the bonding method “‘casting + HIP’+EW + VB” performed better than one made with “‘casting + HIP’+EW + HIP” in high heat flux tests. The abstract also states that divertor operation at 20 MW/m 2 for 1000 cycles has been verified.

Why the authors say this matters

The authors say divertors are critical plasma-facing components in fusion reactors, and that reliable bonding at their interfaces is important for performance and lifespan. The findings indicate that the fabrication method “‘casting + HIP’+EW + VB” is very promising for divertors in other fusion devices or reactors.

What the researchers tested

The researchers compared two divertor mock-ups that differed only in the bonding method between an intermediate copper (Cu) interlayer and an oxide dispersion strengthened copper (ODS-Cu) heat sink material. One mock-up used Hot Isostatic Pressing (HIPing), and the other used brazing (joining materials with a filler metal). They systematically investigated heat transfer, thermal fatigue resistance, and overall reliability through high heat flux tests.

What worked and what didn't

High heat flux test results indicated that the “‘casting + HIP’+EW + VB” divertor performed better than the “‘casting + HIP’+EW + HIP” divertor. The abstract does not provide detailed numerical comparisons for heat transfer, thermal fatigue resistance, or reliability beyond this overall comparison.

What to keep in mind

The comparison is limited to two mock-ups that differed only in the bonding method at one interface. The abstract does not describe additional limitations, and it does not provide detailed test data in the available summary.

Key points

  • The “‘casting + HIP’+EW + VB” divertor outperformed the “‘casting + HIP’+EW + HIP” divertor in high heat flux tests.
  • The abstract states that divertor operation at 20 MW/m 2 for 1000 cycles has been verified.
  • The study compared two mock-ups that differed only in how the Cu interlayer was bonded to the ODS-Cu heat sink.
  • The researchers examined heat transfer, thermal fatigue resistance, and overall reliability.
  • The authors say the “‘casting + HIP’+EW + VB” method is very promising for other fusion devices or reactors.

Disclosure

Research title:
Brazing performed better than HIPing in divertor tests
Authors:
Nanyu Mou, Mingchi Feng, Shuai Huang, Jia Zheng, Le Han, Damao Yao
Institutions:
Chongqing University of Posts and Telecommunications, Chinese Academy of Sciences, Hefei Institutes of Physical Science, Institute of Plasma Physics
Publication date:
2026-04-02
DOI:
10.1016/j.nme.2026.102113
OpenAlex record:
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Image credit:
Photo by WikiImages on Pixabay · Pixabay License
AI provenance: This post was generated by OpenAI. The original authors did not write or review this post.

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