SPS烧结温度对Nb-Si系多元合金组织性能的影响
Effect of Spark Plasma Sintering temperature on microstructure and properties of Nb-Si multi-element alloy
韩政 1杨增艳 2蒋少松1
作者信息
- 1. 哈尔滨工业大学金属精密热加工国家级重点实验室,黑龙江哈尔滨 150001
- 2. 深圳市道通智能航空技术股份有限公司北京分公司,北京 100190
- 折叠
摘要
采用放电等离子烧结(SPS)技术,制备Nb-16Si-10Mo和Nb-16Si-10Mo-10Ti两种合金,分析烧结温度对两类合金组织性能的影响规律.结果表明:Nb-16Si-10Mo合金由Nbss、Nb3Si、Nb5Si3三相组成,而Nb-16Si-10Mo-10Ti合金由Nbss、Nb5Si3、Tiss三相组成,两种合金致密度均高于99.4％.两种合金的维氏硬度、抗压强度随烧结温度升高先增后降,而弯曲强度、断裂韧性则逐渐降低.Ti元素的加入使断口形貌出现了韧窝特征,断裂方式由脆性断裂转变为复合断裂,且使各烧结温度下合金的维氏硬度、压缩强度均有所降低,而弯曲强度、断裂韧性则有所增加.
Abstract
Nb-16Si-10Mo and Nb-16Si-10Mo-10Ti alloys were prepared by Spark Plasma Sintering(SPS)tech-nique.The effect of sintering temperature on the microstructure and properties of the two alloys was analyzed.The results show that Nb-16Si-10Mo alloy is composed of three phases:Nbss,Nb3Si and Nb5Si3,while Nb-16Si-10Mo-10Ti alloy is composed of three phases:Nbss,Nb5Si3 and Tiss,and the densities of both alloys are above 99.4％.With the increase of sintering temperature,the Vickers hardness and compressive strength of the two alloys first increase and then decrease,while the bending strength and fracture toughness gradually decrease.With the addition of Ti element,the fracture morphology appears dimple characteristics,and the fracture mode changes from brittle fracture to composite fracture,and the Vickers hardness and compressive strength of the al-loy are reduced at various sintering temperatures,while the bending strength and fracture toughness are in-creased.
关键词
Nb-Si系多元合金/SPS/烧结温度/组织/性能Key words
Nb-Si multi-element alloy/SPS/sintering temperature/microstructure/property引用本文复制引用
出版年
2024
NETL
NSTL
万方数据