In:
High Temperature Materials and Processes, Walter de Gruyter GmbH, Vol. 40, No. 1 ( 2021-11-25), p. 361-369
Abstract:
Al 2 O 3 dispersion-strengthened (ODS) copper has an excellent comprehensive performance due to the strong hindrance of the high concentration nano-Al 2 O 3 to the dislocations inside copper grains. However, the processability of ODS copper is seriously deteriorated, which is caused by the presence of unfavorable microlevel Al 2 O 3 particles along powder particle boundaries. In this study, a strategy of ball-milling-induced impurity removal is adopted to surmount the dilemma. It was found that the ball milling process can significantly weaken the formation of large Al 2 O 3 particles in the primary boundaries. However, due to the activation of the powder particle surface, the metallurgical bonding between the powder particles is strengthened. The results showed that the ball-milled samples exhibited the optimal properties, including the ultimate tensile strength of 488 ± 3 MPa, elongation of 18.7 ± 0.7%, reduction in the area of 46.8 ± 1.2%, 82.2 ± 0.3 Rockwell Hardness measured on the B scale (HRB), and electrical conductivity of 77.2 ± 0.1% International Association of Classification Societies (IACS).
Type of Medium:
Online Resource
ISSN:
2191-0324
DOI:
10.1515/htmp-2021-0036
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2021
detail.hit.zdb_id:
2602423-8
