B coating SiC heating elements

1、Coating Principle

Boron coating is processed under nitrogen atmosphere. It forms a dense stable nitride protective film on the element surface at 1300℃, which isolates corrosive media and protects SiC substrate at high temperatures.

2、Core Advantages

• Greatly improves high-temperature oxidation resistance of SiC heating elements
• Slows down aging phenomenon: reduces resistance rise caused by long-term operation
• Effectively blocks harmful substances:nitrogen, hydrogen, alkaline gas, volatile metal oxides
• Prevents reaction between SiC and nitrogen above 1400℃, avoids brittleness and premature failure of elements
• Significantly extends overall service life under complex atmosphere conditions

3、High Temperature Performance

• Forms stable solid nitride protective layer at 1300℃
• Resists nitrogen corrosion effectively above 1400℃
• Reduces erosion damage to silicon carbide rods drastically

4、Application Scenarios

Suitable for high-temperature heating, sintering and heat treatment in nitrogen & inert atmosphere furnaces.