Rare Earth alloys
Yittrium alloys
Yttrium alloy manufactured by PML using advanced Vacuum Induction Melting (VIM) technology for precise chemistry, purity, and process control.
Yttrium Alloy: The Master Key to Thermal Stability
A precision-engineered active element designed to prevent oxidation and ensure structural integrity in the most punishing heat environments.
Ingot Manufacturing Process
CoCrNiAlY alloy ingots are produced from high-purity raw elements using PML’s precision-controlled VIM furnace.
RFQ from Customer
Specifications are defined based on application requirements such as thermal resistance, corrosion behavior, or compatibility with coating processes.
Alloy Design/Planning
A combination of Cobalt, Chromium, Nickel, Aluminum, and Yttrium is charged into the VIM furnace under vacuum or atmosphere. Trace elements can be added without breaking vacuum.
Alloy Melting by VIM
Melting occurs under high vacuum to prevent contamination and oxidation. Composition is fine-tuned using in-situ oxygen meters, spectrometry, and temperature monitoring.
Process & Quality Control
Molten alloy is cast into precision molds using an automated tilting mechanism under vacuum to achieve controlled solidification.
Primary Finishing
Ingot surfaces are cropped and cleaned. Final dimensions are verified for downstream usability.
Testing & Packaging
Alloy ingots are tested, documented, and packaged according to customer specifications and application requirements.
Technical Specifications
Chemical Composition (Wt%)
| Element | Min (Wt%) | Max(Wt%) |
|---|---|---|
| Sulphur | 0.00 | 0.012 |
| Phosphorous | 0.00 | 0.012 |
| Chromium | 20.00 | 22 .00 |
| Nickel | 31.00 | 33.00 |
| Cobalt | Balance | Balance |
| Aluminium | 7.00 | 9.00 |
| Yttrium | 0.35 | 0.65 |
| Others | 0.00 | 0.20 |
Process Capability
Properties
The CoCrNiAlY alloy provides high-temperature strength, excellent oxidation resistance, and good ductility due to the presence of Yttrium.
| Alloy | Mechanical properties* | PML alloy: as cast* |
|---|---|---|
| PML CoCrNiALY *Typical | Vicker Hardness (VHN) | 450-600 |
| Tensile Strength Ultimate (UTS) | 900MPa max | |
| Tensile Strength Yield (YS) | 450 - 600MPa | |
| Elongation Break | - | |
| Reduction of Area | - |
Yttrium Alloy: The Master Key to Thermal Endurance
High-performance cobalt-based alloy with superior oxidation resistance, high-temperature stability, and exceptional structural integrity.
Process Capability
Advanced VIM processing enables tight control of chemical tolerances and minimal gas content.
| Input : Batch size | Output | Alloying Elements | Chemistry tolerance | Impurities Max |
|---|---|---|---|---|
| 30 kgs to 600 Kgs | Ingot of required shape as per customers requirement | Ni,Y, Cr, Co | +/- 0.5 % for Higher level % (Above 2 digit) and +/- 0.3 % for lower level % (Single digit) | Oxygen < 25ppm Hydrogen < 3ppm Nitrogen < 50ppm All other impurities < 50 ppm |
Applications
CoCrNiAlY is widely used where thermal and chemical resistance are critical:
1
Aerospace turbine and engine components
2
Automotive exhaust and sensor systems
3
Molds and dies requiring high heat resistance
4
Medical surgical tools
5
Military and defense-grade hardware
6
Thermal spray powders and coatings
Trust, Reliability & Quality
With over six decades of expertise, PML delivers high-performance component technologies and precision solutions trusted across critical industries.
ISO 45001
Occupational Health and Safety (OH&S) management systems
ISO 14001
Environmental Management Systems (EMS)
ISO 9001
Quality Management Systems (QMS)
IATF 16949
International Standard for Automotive Management Systems
AS 9100
Aerospace Quality Management System (QMS)
Frequently Asked Questions
It is widely used in high-temperature applications including thermal spray coatings, aerospace engines, and automotive components.
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