Diamond-Like Carbon PVD Advantages – Executive Summary
| Advantage | ta-C DLC (PVD) | Electroplated Ni | Spray Paint |
|---|---|---|---|
| Hardness (HV) | 3 000 | 700 | 200 |
| Friction vs. steel | 0.04 | 0.3 | 0.4 |
| Max service temp (°C) | 1 000 | 300 | 150 |
| Wear rate @ 600 °C | 5.2×10⁻⁷ mm³/N·m | 5.0×10⁻⁵ | 1.2×10⁻⁴ |
| FDA/REACH | ✅ Compliant | ⚠️ Restricted | ⚠️ Limited |
2. 2024 Performance Matrix – ta-C DLC vs Legacy Finishes
| Metric | ta-C DLC | TiAlCrN | Electroless Ni | DLC Spray |
|---|---|---|---|---|
| Thickness (µm) | 0.1–3 | 1–5 | 5–50 | 25–100 |
| Salt-spray (h) | 1 000 | 1 200 | 48 | 48 |
| Biocompatibility | ✅ | ✅ | ❌ | ❌ |
| Cost / m² (China) | 2.8 USD | 3.2 USD | 2.5 USD | 0.8 USD |
3. How DLC Works – From sp³ Bonds to Surface
| Step | Vacuum Level | Temp (°C) | Action | KPI |
|---|---|---|---|---|
| 1 Plasma Clean | 10⁻³ mbar | 25 | Ar⁺ removes oxide & oil | Contact angle ≤ 8° |
| 2 Bond Layer | 10⁻³ mbar | 200 | 50 nm Cr for adhesion | Calot ±2 nm |
| 3 ta-C Deposition | 10⁻⁴ mbar | 150–400 | Filtered arc sp³-C | ±3 nm uniformity |
| 4 QA & Pack | Air | 25 | CT + nano-indent + salt-spray | CpK ≥ 1.67 |
4. Three 2024 Case Studies
Case 1 – Medical Drill (ta-C DLC)
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Client: EU MedTech startup, 2024
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Challenge: 316L drill needs CE-compliant low-friction finish
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Stack: ta-C 300 nm + Cr 30 nm
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Outcome: Penetration force −25 %, CE mark granted
Case 2 – EV Motor Punch (ta-C DLC)
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Client: US EV Tier-1, 2024
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Challenge: 0.35 mm electrical steel sticking at 400 °C
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Stack: ta-C 1 µm on H13
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Outcome: Tool life 4× longer, scrap −40 %
Case 3 – Optical Lens (ta-C DLC)
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Client: Global OEM, 2024
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Challenge: BK7 glass needs AR + scratch resistance
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Stack: ta-C 100 nm + SiO₂ 200 nm
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Outcome: Reflection < 0.2 %, 9H hardness
5. Global Standards & Sustainability
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ISO 9001:2015 / IATF 16949 / ISO 13485
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REACH, RoHS, FDA 21 CFR §175.300
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Energy: 0.35 kWh per m²
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Waste: Zero liquid effluent
6. 7-Day Delivery Timeline
| Milestone | Lead Time |
|---|---|
| DFM + Quote | 24 h |
| Prototype (1–10 pcs) | 48 h |
| Validation (CT, salt-spray) | 5 days |
| Mass Production | 7–10 days |
| Door-to-Door Delivery | 12 days total |
7. FAQs – Advantages in Real-World Use
| Question | Answer |
|---|---|
| Can DLC coat plastics? | Yes, PEEK, LCP. |
| Largest part? | 800 mm Ø × 1200 mm L. |
| Minimum order? | 1 piece. |
8. How to Order Tomorrow
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Email [email protected] with STEP/IGES.
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Specify substrate, load, temperature, thickness budget.
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Receive DFM + diamond-like carbon PVD advantages quote within 48 h.
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Approve → 3-day prototype → volume ramp.
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