US 12,331,802 B2
Composite material
Geun Sang Cho, Seoul (KR); Choongnyun Paul Kim, Seoul (KR); and Kwan Min Choi, Seoul (KR)
Assigned to KOLON INDUSTRIES, INC., Seoul (KR)
Appl. No. 17/758,734
Filed by KOLON INDUSTRIES, INC., Seoul (KR)
PCT Filed Jan. 14, 2021, PCT No. PCT/KR2021/000569
§ 371(c)(1), (2) Date Jul. 13, 2022,
PCT Pub. No. WO2021/145709, PCT Pub. Date Jul. 22, 2021.
Claims priority of application No. 10-2020-0006342 (KR), filed on Jan. 17, 2020.
Prior Publication US 2023/0056819 A1, Feb. 23, 2023
Int. Cl. F16D 65/12 (2006.01); F16D 69/02 (2006.01)
CPC F16D 65/127 (2013.01) [F16D 65/123 (2013.01); F16D 65/125 (2013.01); F16D 69/027 (2013.01); F16D 2200/0008 (2013.01); F16D 2250/0046 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A brake body for a brake device, the brake body comprising:
a coupling part which is to be connected to a drive shaft; and
a brake part comprising a rotor connected to an outer peripheral surface of the coupling part, and a coating layer provided on a surface of the rotor,
wherein the coating layer comprises an amorphous alloy and has a thermal expansion coefficient 1.0 times to 1.4 times a thermal expansion coefficient of the rotor,
wherein the amorphous alloy comprises:
Fe;
a first component comprising at least one selected from the group consisting of Cr, Mo, and Co;
a second component comprising at one selected from the group consisting of B, C, Si, and Nb, and
wherein the amorphous alloy includes the first component in an amount of 30 to 140 parts by weight and the second component in an amount of 4 to 20 parts by weight, based on 100 parts by weight of Fe included in the amorphous alloy.