KOREA TUNGSTEN CO.,LTD

ITER parts

Tungsten and molybdenum boats and crucibles for vacuum deposition and high-temperature melting. They are used where the vessel must not react with molten metal, and are built to your required shape and capacity.

3,422 °CMelting point of tungstenThe highest of any metal

99.95 % +Material purityIt reduces impurity release

To drawingShape machiningTiles · monoblocks

Diffusion bondingBonding methodJoined to a copper alloy

3,422 °CMelting point of tungstenThe highest of any metal

99.95 % +Material purityIt reduces impurity release

To drawingShape machiningTiles · monoblocks

Diffusion bondingBonding methodJoined to a copper alloy

Applied parts

Used as the evaporation source in vacuum coaters, the melting crucible in high-temperature furnaces and the vessel in crystal growth equipment. Material and shape are designed around what it will hold and at what temperature.

No photos registered100 %Scroll to zoom · drag to pan

MaterialTungsten (W) · copper alloy

Purity99.95 % and above

ProductionBonded after precision machining

GeometryMachined to drawing

BondingDiffusion bonding or brazing

Service environmentHigh heat flux · neutrons

Geometry, bonding and inspection criteria are set by the project specification. Tell us the drawing and your requirements and we will confirm and reply.

No products added

No photos registered100 %Scroll to zoom · drag to pan

MaterialTungsten (W) · copper alloy

Purity99.95 % and above

ProductionBonded after precision machining

GeometryMachined to drawing

BondingDiffusion bonding or brazing

Service environmentHigh heat flux · neutrons

Geometry, bonding and inspection criteria are set by the project specification. Tell us the drawing and your requirements and we will confirm and reply.

No products added

KEY FEATURES

A plasma-facing material has to take the heat flux

The surface must not melt, and the heat has to leave underneath.

The tungsten surface is bonded to a copper alloy cooling section that carries the heat away.

Highest melting point

Highest Melting Point

Tungsten 3,422 °C. Used as the surface material taking the plasma heat flux directly.

Low sputtering

Low Sputtering Yield

Erosion under particle bombardment is low, which reduces plasma contamination.

Bond reliability

Joint Reliability

The joint with the cooling section is controlled so it does not separate under thermal cycling.

Melting points by material

Tungsten (W)3422

Molybdenum (Mo)2623

Copper (Cu)1085

Melting point °C. A plasma-facing material needs the highest figure.

Why tungsten

Its high melting point and low erosion make it last longest in the position that meets the plasma.

Bond face control

However strong the surface, if the bond separates the heat cannot leave and damage starts there.

KEY FEATURES

A plasma-facing material has to take the heat flux

The surface must not melt, and the heat has to leave underneath.

The tungsten surface is bonded to a copper alloy cooling section that carries the heat away.

Highest melting point

Highest Melting Point

Tungsten 3,422 °C. Used as the surface material taking the plasma heat flux directly.

Low sputtering

Low Sputtering Yield

Erosion under particle bombardment is low, which reduces plasma contamination.

Bond reliability

Joint Reliability

The joint with the cooling section is controlled so it does not separate under thermal cycling.

Melting points by material

Tungsten (W)3422

Molybdenum (Mo)2623

Copper (Cu)1085

Melting point °C. A plasma-facing material needs the highest figure.

Why tungsten

Its high melting point and low erosion make it last longest in the position that meets the plasma.

Bond face control

However strong the surface, if the bond separates the heat cannot leave and damage starts there.

3,422°CMelting point of tungsten

99.95% +Material purity

DrawingbasisMachined geometry

3,422°CMelting point of tungsten

99.95% +Material purity

DrawingbasisMachined geometry

DESIGN PRECISION

Geometry set to your requirements

In a plasma-facing material, geometry and bonding are what distinguish the product.

In the same material, changing the geometry and the bonding method changes the heat removal and the service life.

Drawingbasis

Machined geometry

Tile thickness and edge geometry are machined as drawn.

Diffusion bondingor brazing

Bonding method

Chosen in light of the heat flux and cycling conditions.

Inspectionspecified

Quality criteria

Non-destructive inspection items are set to the specification.

We do not pick a specification, we develop it with you. (Give us the required heat flux and the bonding conditions, and we will work out the geometry with you.)

DESIGN PRECISION

Geometry set to your requirements

In a plasma-facing material, geometry and bonding are what distinguish the product.

In the same material, changing the geometry and the bonding method changes the heat removal and the service life.

Drawingbasis

Machined geometry

Tile thickness and edge geometry are machined as drawn.

Diffusion bondingor brazing

Bonding method

Chosen in light of the heat flux and cycling conditions.

Inspectionspecified

Quality criteria

Non-destructive inspection items are set to the specification.

We do not pick a specification, we develop it with you. (Give us the required heat flux and the bonding conditions, and we will work out the geometry with you.)

APPLICATIONS

Applications

The fields where ITER parts are used. Geometry and bonding differ by position.

Divertor tilesUsed as plasma-facing tiles taking the heat flux directly.

MonoblocksMade as tungsten blocks surrounding a cooling tube.

First wall partsUsed as protective parts on the inner wall of the vacuum vessel.

Diagnostic partsUsed as shielding parts for measurement windows and support structures.

Test specimensWe machine specimens for heat flux and irradiation testing.

Research plantUsed as parts in fusion devices at research institutions in Korea and abroad.

Divertormonoblocksfirst walldiagnostic partstest specimens

APPLICATIONS

Applications

The fields where ITER parts are used. Geometry and bonding differ by position.

Divertor tilesUsed as plasma-facing tiles taking the heat flux directly.

MonoblocksMade as tungsten blocks surrounding a cooling tube.

First wall partsUsed as protective parts on the inner wall of the vacuum vessel.

Diagnostic partsUsed as shielding parts for measurement windows and support structures.

Test specimensWe machine specimens for heat flux and irradiation testing.

Research plantUsed as parts in fusion devices at research institutions in Korea and abroad.

Divertormonoblocksfirst walldiagnostic partstest specimens

LEAD TIME

Fabrication and Lead Time

This product is made to your drawing. Here is the process, step by step.

STEP 01

Drawing received

Send us the monoblock dimensions, cooling tube specification and required purity.

Reply within 1 day

STEP 02

Specification review

We review the material grade and machining tolerances and set the inspection items.

3 – 5 days

STEP 03

Precision machining

Machined to the dimensions on the drawing, including the cooling tube bore.

By agreement, depending on the production schedule

STEP 04

Inspection · delivery

Dimensions and surface defects are inspected, and the part ships with a test report. Repeat orders to the same drawing skip the review stage.

By agreement, depending on the production schedule

Minimum quantity

By agreement

Quantities are set per project.

Standard lead time

By agreement

From drawing approval. It varies with the inspection items.

Supplied with it

Test report

Dimensional and surface inspection results are sent with the delivery.

LEAD TIME

Fabrication and Lead Time

This product is made to your drawing. Here is the process, step by step.

STEP 01

Drawing received

Send us the monoblock dimensions, cooling tube specification and required purity.

Reply within 1 day

STEP 02

Specification review

We review the material grade and machining tolerances and set the inspection items.

3 – 5 days

STEP 03

Precision machining

Machined to the dimensions on the drawing, including the cooling tube bore.

By agreement, depending on the production schedule

STEP 04

Inspection · delivery

Dimensions and surface defects are inspected, and the part ships with a test report. Repeat orders to the same drawing skip the review stage.

By agreement, depending on the production schedule

Minimum quantity

By agreement

Quantities are set per project.

Standard lead time

By agreement

From drawing approval. It varies with the inspection items.

Supplied with it

Test report

Dimensional and surface inspection results are sent with the delivery.

HANDLING

Handling precautions

These apply to refractory metals in general. Service life depends heavily on how the parts are handled.

Do not touch the parts with bare hands after unpacking. Oil from fingerprints carbonizes at high temperature and becomes a contaminant.

The material is weak against impact and bending. Tungsten is brittle at room temperature and can crack if dropped.

Do not heat above 500°C in air; oxidation accelerates sharply. Always use the parts in a vacuum or an inert atmosphere.

Avoid rapid heating and cooling. On first use, we recommend pre-heating (aging) at low current.

Store indoors in a dry place and keep the moisture-barrier packaging intact.

If your installation or operating conditions are unusual, our engineers will review them in advance. Send a drawing or your process conditions and we will start by selecting the right material with you.