MSDS File
Product Overview
Chromium Molybdenum Evaporation Materials (Cr/Mo) is an alloy evaporation material intended for depositing multi-element metallic films. Unlike a pure element, an alloy may not evaporate congruently because its constituents can have different vapor pressures. As a result, source composition, evaporation method, deposition rate, and film-composition verification should be considered together; for very composition-sensitive films, co-evaporation from separate sources may be evaluated.
Evaporation Behavior and Process Considerations
Different alloying elements may evaporate at different rates because their vapor pressures are not identical. This can cause the source surface and deposited film to drift away from the nominal alloy composition during a run. For demanding composition control, film analysis, source replenishment strategy, or co-evaporation from separately controlled sources may be more reliable than assuming one alloy charge will evaporate congruently.
Technical Data
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Purity | 99.9% – 99.999% (3N–5N) | Reduces impurity-related defects |
| Composition | Custom Cr/Mo ratio (wt% or at%) | Controls hardness & thermal behavior |
| Form | Pieces / Granules / Pellets | Compatible with evaporation systems |
| Melting Range | >1900°C (composition-dependent) | Requires high-temperature control |
| Density | ≥ 99% theoretical | Ensures uniform vaporization |
| Packaging | Vacuum-sealed / inert-packed | Prevents oxidation |
| Material | Key Advantage | Typical Application |
|---|---|---|
| Chromium Molybdenum (Cr/Mo) | High strength & thermal stability | Protective coatings |
| Pure Chromium (Cr) | Strong adhesion & oxidation resistance | Barrier layers |
| Pure Molybdenum (Mo) | Excellent high-temperature conductivity | High-temp films |
| Tungsten Molybdenum (W/Mo) | Extreme thermal resistance | Harsh environment coatings |
| Question | Answer |
|---|---|
| Can the Cr/Mo ratio be customized? | Yes, alloy composition can be tailored to meet specific mechanical or thermal requirements. |
| Is the material supplied pre-alloyed? | Yes, standard Cr/Mo evaporation materials are pre-alloyed for uniform deposition behavior. |
| What deposition methods are suitable? | Electron beam evaporation is generally preferred due to the high melting points. |
| Are custom sizes available? | Yes, material form and particle size can be customized to fit system requirements. |
| Which industries use Cr/Mo films most? | Aerospace research, semiconductor manufacturing, tooling coatings, and advanced materials laboratories. |
Typical Thin-Film Applications
- Composition-tuned alloy films for electrical, magnetic, optical, or mechanical functionality
- Multilayer and thin-film metallization studies
- R&D where alloy ratio or co-evaporation strategy is part of the process design
Source Form and Ordering Considerations
For quotation, provide material, purity, source form, particle or piece size, quantity, evaporation method, and any boat, basket, crucible, or e-beam hearth constraints. If the material will be used for a specific coating stack, sharing the intended film thickness or deposition application can help with source-form selection and packaging recommendations.
Frequently Asked Questions
Will Chromium Molybdenum evaporate with the same composition as the bulk alloy?
Not necessarily. Alloy constituents can have different vapor pressures, so the vapor and deposited film may become enriched in the more volatile component as evaporation proceeds.
When is co-evaporation preferable to using a Chromium Molybdenum alloy source?
Co-evaporation can be preferable when precise film composition must be maintained independently because separate source rates can be controlled and adjusted during deposition.
Can Chromium Molybdenum be evaporated by electron beam?
Often yes, especially when the alloy requires high source temperature. The actual behavior depends on melting, segregation, evaporation rate, and whether the constituents remain sufficiently mixed in the melt.
How should film composition be verified for Chromium Molybdenum?
For composition-critical films, analytical verification such as EDS, XRF, XPS, or another appropriate method should be used rather than assuming the film exactly matches the source alloy.
What source form is suitable for Chromium Molybdenum evaporation?
Pieces, pellets, or granules may be supplied depending on the source holder. A stable charge geometry helps reduce movement and sudden changes in the heated surface.
What should I include in a Chromium Molybdenum evaporation-material RFQ?
Specify alloy ratio, purity basis, source form and size, quantity, evaporation method, and the required film-composition tolerance if it is important.
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