High-Purity Boron Carbide Targets for PVD by China Suppliers | Reliable Factory Manufacturing
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 (FAQ)
Q: What is the hardness of boron carbide thin films?
Boron carbide thin films can achieve an exceptional hardness of 30-40 GPa (approximately 3000-4000 HV), making it one of the hardest known materials to significantly enhance wear and scratch resistance.
Q: How does boron carbide perform under corrosive or high-temperature conditions?
It exhibits extremely high corrosion resistance against both acids and bases, and it maintains excellent chemical inertness and structural stability even at elevated temperatures.
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 ideal for weight-sensitive, lightweight protective applications.
Q: What sputtering method is recommended for boron carbide targets?
Due to its relatively poor electrical conductivity, RF (radio frequency) sputtering is required. This mature process yields uniform thin films with excellent adhesion.
Q: Why is boron carbide used in nuclear shielding?
The element boron has a high thermal neutron absorption cross-section of 600 barns, which makes it an ideal choice for shielding materials and control rods in nuclear reactors.
Q: Can boron carbide withstand extreme thermal shock?
Yes. With a melting point of up to 2450°C and a very low coefficient of thermal expansion, it maintains its structural integrity and resists cracking during drastic temperature changes.