US 12,454,489 B2
Alumina-based ceramic tool material with low thermal expansion and preparation process thereof
Chuanzhen Huang, Qinhuangdao (CN); Zexin Li, Jinan (CN); Hanlian Liu, Jinan (CN); Zhenyu Shi, Jinan (CN); Peng Yao, Jinan (CN); Dun Liu, Jinan (CN); Hongtao Zhu, Jinan (CN); Bin Zou, Jinan (CN); Jun Wang, Shandong (CN); Zhen Wang, Qinhuangdao (CN); Longhua Xu, Qinhuangdao (CN); Shuiquan Huang, Qinhuangdao (CN); Meina Qu, Qinhuangdao (CN); and Zhengkai Xu, Qinhuangdao (CN)
Assigned to SHANDONG UNIVERSITY, Jinan (CN); and YANSHAN UNIVERSITY, Qinhuangdao (CN)
Filed by SHANDONG UNIVERSITY, Shandong (CN); and YANSHAN UNIVERSITY, Hebei (CN)
Filed on Sep. 28, 2022, as Appl. No. 17/955,237.
Claims priority of application No. 202211027605.0 (CN), filed on Aug. 25, 2022.
Prior Publication US 2024/0067567 A1, Feb. 29, 2024
Int. Cl. C04B 35/117 (2006.01); B23B 27/14 (2006.01); C04B 35/626 (2006.01); C04B 35/645 (2006.01)
CPC C04B 35/117 (2013.01) [B23B 27/148 (2013.01); C04B 35/6261 (2013.01); C04B 35/6264 (2013.01); C04B 35/62655 (2013.01); C04B 35/645 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3224 (2013.01); C04B 2235/3258 (2013.01); C04B 2235/3856 (2013.01); C04B 2235/3886 (2013.01); C04B 2235/606 (2013.01); C04B 2235/656 (2013.01); C04B 2235/6581 (2013.01); C04B 2235/9607 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A preparation process of an alumina-based ceramic tool material, comprising the steps of:
(1) carrying out a primary ball milling on Al2O3 powder, Sc2O3 powder, WO3 powder, Ti(C,N) powder and MgO powder individually;
(2) after the primary ball milling, adding the Al2O3 powder, the Sc2O3 powder, the WO3 powder, the Ti(C,N) powder and the MgO powder into a milling pot, wherein a mass fraction of the MgO powder added into the milling pot is 3%-5%, a mass fraction of the Sc2O3 powder added into the milling pot is 1.5%-6%, a mass fraction of the WO3 powder added into the milling pot is 7.5%-36%, a mass fraction of the Ti(C,N) powder added into the milling pot is 10%-30%, and a remaining amount added into the milling pot is the Al2O3 powder, and carrying out a secondary ball milling after adding appropriate amounts of anhydrous ethanol and alumina balls; drying the slurries obtained after the secondary ball milling, and then obtaining a composite powder by sieving the powder formed after the slurries are dried; and
(3) pre-pressing the composite powder into a green body, and then carrying out a vacuum hot-press sintering on the green body to obtain the alumina-based ceramic tool material.