Effect of Ni:Si ratio on microstructure and properties of powder metallurgical Corson alloy

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Science of Sintering Pub Date : 2023-01-01 DOI:10.2298/sos230329026a

M. Akkaş, H. Atapek, Ş. Polat

引用次数: 0

Abstract

In this study, powder metallurgical Cu-Ni-Si alloys with different Ni:Si ratios are produced by cold pressing sintering (600 MPa, at 950?C for 60 min) and bulk materials are solution annealed at 950?C for 60 min, quenched in water and aged at 450?C for 60 min. A fine distribution of Ni-Si compounds embedded in a netted-free structure is formed in the matrix. Although a conductivity level of at least 22% IACS is achieved in all powder metallurgical alloys, the impurity effect is dominant and a decrease in the conductivity is detected by increasing Ni:Si ratio. However, a slight increase in electrical conductivity is achieved by the precipitation of nickel silicides in the ?-Cu matrix under aging conditions. Increasing Ni:Si ratio directly increases the hardness of the powder metallurgical matrix, and a hardness value of 73 HV0.1 is obtained for the aged alloy having the highest Ni:Si (5:1) ratio.

查看原文本刊更多论文

Ni:Si比对粉末冶金Corson合金组织和性能的影响

在本研究中，采用冷压烧结(600 MPa, 950℃)制备了不同Ni:Si比的粉末冶金Cu-Ni-Si合金。(C 60分钟)，散装材料在950℃下溶液退火。C加热60分钟，在水中淬火，在450?在无网状结构中，Ni-Si化合物在基体中形成了良好的分布。虽然所有粉末冶金合金的电导率水平至少达到22% IACS，但杂质影响是主要的，并且通过增加Ni:Si比可以检测到电导率的降低。然而，在时效条件下，硅化镍在-Cu基体中析出，电导率略有提高。提高Ni:Si比直接提高粉末冶金基体的硬度，时效合金的硬度值为73 HV0.1，且Ni:Si比(5:1)最高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Science of Sintering 工程技术-材料科学：硅酸盐

CiteScore

2.50

自引率

46.70%

发文量

审稿时长

3.3 months

期刊介绍： Science of Sintering is a unique journal in the field of science and technology of sintering. Science of Sintering publishes papers on all aspects of theoretical and experimental studies, which can contribute to the better understanding of the behavior of powders and similar materials during consolidation processes. Emphasis is laid on those aspects of the science of materials that are concerned with the thermodynamics, kinetics and mechanism of sintering and related processes. In accordance with the significance of disperse materials for the sintering technology, papers dealing with the question of ultradisperse powders, tribochemical activation and catalysis are also published. Science of Sintering journal is published four times a year. Types of contribution: Original research papers, Review articles, Letters to Editor, Book reviews.