The New Technology PVD of Our Magnets

Physical vapour deposition (PVD)

Grain boundary diffusion process (Dysprosium, Terbium)

Key word: High HCJ & High (BH)max & High thermal stability

Current situation:

1. Comprehensive properties limited. N50H, N48SH, N45UH, N35EH.
2. High HCJ & (BH) max unavailable or not common in the market, such as N50UH, N48EH, N50SH, N48UH.
3. High grade means high price.

What we can do:

Improving the Comprehensive Magnetic Properties of magnets, meanwhile reduce the cost.

1. Reduce formula cost.
2. New option for motor design: High torque & high working temperature is avaliable for some special motor.
3. Replace other magnets, such as Samarium cobalt.

What we have:

1. Original magnet manufacture is core competencies.
2. Advanced PVD process centre & Independent grain boundary diffusion process.
3. Experienced R&D team.

Technical data comparison

Substrate magnet					Diffusion (Dy)	Diffusion (Tb)	After Diffusion
Grade	dimension	Hcj (KOe)	Magnet Flux (nVsm)		Hcj (KOe)	Hcj (KOe)	Magnet Flux (nVsm)
N45SH	30×14.5×2.5	20.25	1.283	1.294	27.34	29.56	1.293	1.29
N45M	32x12x3	15.2	1.043	1.044	20.23	22.81	1.05	1.053
N52	14×11.5×2.5	13.18	0.785	0.789	19.07	21.16	0.786	0.789

Substrate magnet			Diffusion (Dy)	After Diffusion Dysprosium
Grade	dimension	Hcj (KOe)	Hcj (KOe)	Aging test condition	Aging test result
N45SH	30×14.5×2.5	20.25	27.34	130°C 2hours 1mm iron	1.284	1.281	1.283	1.282	1.279
					1.282	1.278	1.28	1.28	1.276
					0.16%	0.23%	0.23%	0.16%	0.23%
N45M	32x12x3	15.2	20.23	130°C 2hours 1mm iron	1.032	1.028	1.035	1.035	1.026
					0.873	0.866	0.896	0.879	0.895
					15.41%	15.76%	13.43%	15.07%	12.77%
N52	14×11.5×2.5	13.18	19.07	130°C 2hours 1mm iron	0.782	0.769	0.783	0.784	0.746
					0.675	0.669	0.693	0.682	0.676
					13.68%	13.00%	11.49%	13.01%	9.38%

Substrate magnet			Diffusion (Dy)	After Diffusion Dysprosium
Grade	dimension	Hcj (KOe)	Hcj (KOe)	Aging test condition	Aging test result
N45SH	30×14.5×2.5	20.25	29.56	150°C 2.5hours 1mm iron	1.303	1.296	1.299	1.296	1.296
					1.284	1.267	1.284	1.281	1.277
					1.46%	2.24%	1.15%	1.16%	1.47%
N45M	32x12x3	15.2	22.81	130°C 2hours 1mm iron	1.053	1.057	1.056	1.058	1.056
					1.046	1.051	1.047	1.046	1.049
					0.66%	0.57%	0.85%	1.13%	0.66%
N52	14×11.5×2.5	13.18	21.16	130°C 2hours 1mm iron	0.792	0.79	0.793	0.794	0.791
					0.785	0.778	0.786	0.785	0.788
					0.88%	1.52%	0.88%	1.13%	0.38%

Price comparison

The semifinished magnet price reduce much, which lead to reduce 10-20% for the final magnet price.

Our regular customers start to use new magnets after reliability test, and consider to develop new motor under higher magnets.

Weldome to discuss.