Microstructure Characteristics and Properties of HVOF Sprayed Ni-Based Alloy Nano-h-BN Self-Lubricating Composite Coatings

Table 1

Properties of the original powders for HVOF spraying.

Properties	Ni45	h-BN
Density (g·cm^−3)	8.4	2.2
Content (wt.%)	Cr: 12~15%, B: 2.0~3.0%, Si: 2.0~3.5%,; C: 0.3~0.6%, Fe ≤ 12%, Ni: allowance	≥99.9%
Linear expansibility (10^−6·K^−1)	12.37 (at 540°C)	8.58 (at 20~600°C)
Thermal conductivity (W·m^−1·K^−1)	14.7~15.5 (at 300°C)	15.16 (at 300°C)
Mean particle size	37.5~60 μm	80 nm