Latest NTST News:
New Hi-Tech Coatings:
Aluminum Nitride (AlN)
Boron Carbide (B4C)
Cubic Boron Nitride (c-BN)
Hex Boron Nitride (h-BN)
Chromium Nitride (CrN)
Silicon Carbide (SiC)
Silicon Nitride (Si3N4)
Titanium Nitride (TiN)
Zirconium Nitride (ZrN)
Titanium Diboride (TiB2)
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Nevada Thermal Spray Tech.
4842 Judson Avenue, Suite 115
Las Vegas, NV 89115
Thermal spray coatings are
used in over 50 industries
Boron Carbide (B4C) Coatings
NTST has developed the capability to fabricate B4C coatings using thermal spray technology. This coating can serve as a cost saving replacement for most wear coatings currently being used in industry.
B4C is a low density material with high strength and elastic modulus. It is the hardest material next to diamond, making it extremely valuable for wear applications, due to the direct correlation of hardness to wear resistance. It posses high resistance to fracture, erosion, and abrasion; and, high heat and chemical resistance (i.e. unaffected by acid or alkaline solutions). B4C coatings have excellent self-mating (lubrication) and anti-galling properties.
B4C is an excellent material for use in industrial applications in the nuclear, aerospace, semiconductor, sputtering targets, and military (e.g. armor). It is an excellent neutron absorber for use as a radiation shield. Boron has been approved by the FDA, and is used in the pharmaceutical industry.
NTST has developed pure B4C coatings, B4C cermets (B4C+TI, B4C+Ni), and SiC-B4C composite coatings. The pure B4C coatings were designed for use in the food processing industry for mechanical seals and components (Figure 1). The cermets were designed for use in the petrochemical industry for valves and instrumentation (Figure 2). The SiC-B4C composite coatings were designed for use for dual wear-corrosion applications (Figure 3).
NTST B4C coatings have been characterized by several outside labs. The coatings are dense, hard, and wear resistant. Porosity is 2%. Vickers hardness is over 1500. Coating bond strength is over 6000 psia. XRD conducted on the B4C coatings has indicated that the coating is the same composition as the starting powder.
Figure 1. B4C coating on sleeve
Figure 2. B4C coating (40 mils) on 12' long titanium rod
Figure 3. SiC-B4C composite coatings