High-Purity Boron Carbide Targets for PVD - Leading China Suppliers and Factory for Superhard Ceramics
Film properties
Boron carbide thin films can achieve a hardness of 30-40 GPa (approximately 3000-4000 HV), making it one of the hardest known materials, significantly enhancing the wear resistance and scratch resistance of device surfaces. It exhibits extremely high corrosion resistance against acids and bases, particularly maintaining good chemical inertness at high temperatures. The material has a low density (approximately 2.52 g/cm³), but an extremely high Young's modulus, making it suitable for lightweight protective applications where weight sensitivity is important.
High-efficiency sputtering performance
High-density (≥98% theoretical density) targets are obtained through hot pressing (HP) or hot isostatic pressing (HIP), which reduce particle splatter and cracking during the sputtering process. Although the conductivity is relatively poor (requiring RF radio frequency sputtering), the process is mature and can yield uniform thin films with good adhesion.
Special functional characteristics
The element boron has a high thermal neutron absorption cross-section (600 barns), making it an ideal choice for control rods in nuclear reactors and shielding materials. With a melting point of up to 2450°C, it maintains structural stability and performance in high-temperature environments. Its low coefficient of thermal expansion allows it to withstand drastic temperature changes without cracking.
Frequently Asked Questions
Q: What is the hardness of Boron Carbide thin films?
Boron carbide thin films can reach an exceptional hardness of 30-40 GPa (approximately 3000-4000 HV), making it one of the hardest known materials to effectively enhance wear and scratch resistance.
Q: Is Boron Carbide suitable for lightweight applications?
Yes, it has a low density of approximately 2.52 g/cm³ combined with an extremely high Young's modulus, making it perfect for weight-sensitive, lightweight protective structures.
Q: How do Boron Carbide targets perform during sputtering?
By using high-density targets (≥98% theoretical density) prepared via hot pressing (HP) or hot isostatic pressing (HIP), particle splatter and cracking are minimized. The process yields uniform thin films with excellent adhesion.
Q: What sputtering method is required for Boron Carbide?
Since Boron Carbide has relatively poor electrical conductivity, RF (radio frequency) sputtering is required to achieve high-quality thin film deposition.
Q: Why is Boron Carbide used in nuclear applications?
The boron element features a high thermal neutron absorption cross-section of 600 barns, making it an outstanding material choice for shielding and control rods in nuclear reactors.
Q: Can Boron Carbide withstand high-temperature environments?
Yes, with a melting point of up to 2450°C and a low coefficient of thermal expansion, it maintains structural stability and resists cracking even under drastic temperature changes.