MPEX-00-ENG-002-A1 (1) (1).pdf

Material Plasma Exposure Experiment Oak Ridge National Laboratory

Vacuum Handbook Appendix 1: Approved Material List

MPEX-00-ENG-002-A1

MATERIAL PLASMA EXPOSURE EXPERIMENT

(MPEX)

Prepared by

OAK RIDGE NATIONAL LABORATORY

Oak Ridge, TN 37831-6283

Managed by

UT-BATTELLE, LLC

For the

US DEPARTMENT OF ENERGY

under contract DE-AC05-00OR22725

January 2022

This report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or any agency thereof.

Vacuum Handbook Appendix 1: Approved Materials List for the

Material Plasma Exposure Experiment Project

MPEX-00-ENG-002-A1

Authors(s):

Jeff Ulreich, Preparer, Class 1-5 Date

Andrei Petrov, Preparer, Class 6 Date

Earle Burkhardt, Preparer, Class 7 Date

Reviewer(s):

Jonathan Perry, Vacuum SME Date

Rob Crowell, Water Chemistry SME Date

Approver(s):

Adam Aaron, Vacuum Systems CAM Date

LaTravia Harmon, QA Representative Date

Arnold Lumsdaine, MPEX Lead Engineer Date

Vacuum Handbook Appendix 1: Approved Materials List for the

Material Plasma Exposure Experiment Project

MPEX-00-ENG-002-A1

Change Log

Revision History Revision Date Description of Changes

0 2021-01-04 Initial issue

MPEX-00-ENG-002-A1 Appendix 1 – Approved Materials List Page 1 of 9

The MPEX materials list has been created to assist in the correct choice of materials to meet the scientific requirements of the facility.

MPEX materials are classified for use using the following classes:

Class 1 – Plasma Interacting - materials that interact directly with the plasma during operation

Class 2 – Near Plasma – materials that may, but generally do not directly interact with the plasma

Class 3 – UHV/HV/Plasma Facing – materials that are in UHV or HV but do not interact with the plasma

Class 4 – Rough vacuum – materials that are used in the rough vacuum system

Class 5 – Atmosphere – materials used outside of the vacuum systems

Class 6 – Wetted Demin – components with wetted surfaces in the Demineralized Water loops

Class 7 – Magnetic Field Sensitive - components used inside the influence of the magnetic field lines

Materials are approved, restricted, or prohibited for each class and category using the following qualification system.

Material approved for usage

Material restricted to specific use; program approval required

Material prohibited from use

Components may fall under the limitations for us of multiple classes. For example, vacuum chambers inside of the magnets, that are water cooled, fall under Class 3, 6, and 7 limitations. Material selection must be compatible with the limitations of all classes the component falls under.

Restricted materials are application specific. Contact the MPEX Vacuum Systems Team for approval of specific uses. The Vacuum Systems Team (Section 6) will review the material for vacuum compatibility and escalate to review with program science compatibility as needed.

Many materials are approved for certain classes but may not meet the temperature or other functional requirements of a specific use.

Material selection must take all application specific requirements and environmental conditions into consideration.

MPEX-00-ENG-002-A1 Appendix 1 – Approved Materials List Page 2 of 9

Materials not shown on this list are not approved for use in the MPEX vacuum system. If a material is not on the list is needed, contact the MPEX Vacuum Systems Team. The Vacuum Systems team will review for vacuum compatibility and escalate the material to the science team as necessary for approved, restricted use, or prohibited status.

MPEX Environment Class

Material Type Material Grade Class

Class

Class

Class

Class

Class

Class

7 Comments Metals Austenitic Stainless Steels

316L

316LN

316LN-ESR

Class 2 restriction: for use as a vacuum barrier material only Weld processes must be verified for magnetic permeability NOTE: 316LN and LN-ESR are not permitted for PV use by BPVC section II D, Table 1A

310 series

Higher nickel content, not susceptible to magnetic work hardening effects, good choice for non-magnetic welds

Class 3 and 4 restrictions: Must be used outside of the magnetic fields (work hardened relative permeability can be as high 10)

302/303 or any sulfur added free machining grade

321/347

Class 3 and 4 restrictions: Must be used outside of the magnetic fields (work hardened relative permeability can be as high 10). Alloyed with Ti and Ta that act as martensite stabilizer, very likely to be

MPEX-00-ENG-002-A1 Appendix 1 – Approved Materials List Page 3 of 9

MPEX Environment Class

Material Type Material Grade Class

Class

Class

Class

Class

Class

Class

7 Comments ferromagnetic after cold working or welding

Nitronic 50 Nitronic 60

Precipitation hardened Stainless Steel

Grade 660 (UNS S66286) (A286)

Class 2 restriction: for use as a vacuum barrier material only High temperature, high strength, PH alloy, relative permeability 1.01

Titanium Grade 1 Grade 2 Grade 5 (Ti6Al4V) Grade6

Aluminum 1100 5052,5083 6061, 6063 7050, 7075

No anodized coatings in vacuum

Ferritic stainless steel

400 series 17-4 17-7

Not compatible with vacuum (oxidation) or magnetic fields. Must have corrosion protection for atmospheric use. Must be reviewed for magnetic field compatibility.

Carbon Steel Not compatible with vacuum (oxidation) or magnetic fields.

Class 5 Restrictions: Must have corrosion protection for atmospheric use.

MPEX-00-ENG-002-A1 Appendix 1 – Approved Materials List Page 4 of 9

Material Type Material Grade Class

Class

Class

Class

Class

Class

Class

7 Comments Must be reviewed for magnetic field compatibility.

Tungsten Pure Non-magnetic Class 1 Class 2 Class 3

Sintered tungsten must be vacuum baked after machining and cleaning.

Magnetic Class 1-4

Restricted to uses that do not impact magnetic field lines, requires program approval for each use

OFE Copper (formerly OFHC)

C10100 C10200

Class 2 use restricted to gaskets and seals for vacuum barriers

Note: Copper is diamagnetic and may impact magnetic field lines

CuCrZr alloys UNS C18150, C18160, C18400

High strength, High temperature, High conductivity copper

GLIDCOP UNS C15725

(AL-15),

UNS C15725

(AL-25),

UNS C15760

(AL-60)

High strength, High temperature, High conductivity copper. Copper mixed with Aluminum Oxide

CuCrNb alloys GRCop-42 GRCop-84

High strength, High temperature, High conductivity copper.

Gold

MPEX-00-ENG-002-A1 Appendix 1 – Approved Materials List Page 5 of 9

Material Type Material Grade Class

Class

Class

Class

Class

Class

Class

7 Comments

Silver

Molybdenum

TiZrMo

TZM

Platinum

Beryllium Copper

Aluminum Bronze UNS 62400

UNS 62500

UNS C63200

(82Cu- 9Al5Ni4Fe)

Tantalum sheet

Silicon

Specifically Prohibited Materials Beryllium

Health prohibition of use

Lead

Health prohibition of use

Selenium

Program or vacuum prohibition

MPEX-00-ENG-002-A1 Appendix 1 – Approved Materials List Page 6 of 9

Material Type Material Grade Class

Class

Class

Class

Class

Class

Class

Potassium

Phosphorous

Sodium

Magnesium

Zinc

Cadmium

Glass/Ceramics - Use only demineralized water as a coolant when machining ceramics and machinable glass as Cutting fluids will contaminate the components and render them unsuitable for vacuum service.

Al2O3 Alumina

Sapphire Ruby

Borosilicate Glass BK-7

Vacuum windows, Max working temp 350 C

Fused Silica

Vacuum windows, Max working temp 1100 C

Quartz

Silicon Nitride

MPEX-00-ENG-002-A1 Appendix 1 – Approved Materials List Page 7 of 9

Material Type Material Grade Class

Class

Class

Class

Class

Class

Class

Silicon Carbide

Tungsten Carbide

Macor

Boron Nitride

Finishes and Coatings PVD (physical vapor deposition)

TiN TiCN TiAlN/AlTiN CrN ZrN

Magic Black Fractal Black

ACKTAR PVD metal oxide coatings for optical and stray light absorption in UHV environments

Thin Dense Chrome

(TDC)

Armoloy Max working temp 1600 F

Thermal Spray Coatings

Tungsten

Nickel plating Low phosphor electroless nickel required for gold plating components, good coating for EMI/EMP mitigation

Anodized coatings

Anodized coatings are not permitted in vacuum, are permissible for applications in atmosphere

MPEX-00-ENG-002-A1 Appendix 1 – Approved Materials List Page 8 of 9

Material Type Material Grade Class

Class

Class

Class

Class

Class

Class

7 Comments Powder Coating Powder coatings are preferred for carbon steel structures Paint Specific paint must be approved for use

Plastics Polyimide Kapton

Vespel Meldin

Class 3 restriction: Specific uses must be program approved, working temperature limitations

PTFE Teflon

Specific uses must be program approved, not good in radiation environment, working temp limited

PEEK

limitations

Poylamide/imide

(PAI)

Torlon limitations

Lubricants and Greases Molybdenum Disulfide

MoS2 Max operating temp of 1000 C

Class 5 restriction: not a good lubricant when in the presence of moisture or when oxidized

Tungsten Disulfide WS2 650 C in atm, 1315 C in vacuum

MPEX-00-ENG-002-A1 Appendix 1 – Approved Materials List Page 9 of 9

Material Type Material Grade Class

Class

Class

Class

Class

Class

Class

7 Comments Apiezon Vacuum Grease

Apiezon H (High Temp)

Working temp 240 C, doesn’t melt, vapor pressure 1.7x10-9 torr, must have program approval

Apiezon L

Working temp 86 C, radiation resistant, vapor pressure 7x10-11 torr, must have program approval

Apiezon 100 Working temp 86 C, contains PTFE, vapor pressure 1.7x10-9 torr, must have program approval

Adhesives and Epoxies None approved at this time