Novel (Hf0.2Zr0.2Ta0.2V0.2Nb0.2)B2 high entropy diborides with superb hardness sintered by SPS under a mild condition

材料科学 陶瓷 放电等离子烧结 球磨机 硼化物 烧结 研磨 固溶体 复合材料 微观结构 相对密度 冶金
作者
Yao Yang,Jianqiang Bi,Kangning Sun,Linjing Qiao,Yi Liu,Yonghan Li,Hongyi Wang,Yanjie Liang,Mengmeng Shang
出处
期刊:Ceramics International [Elsevier BV]
卷期号:48 (20): 30859-30867 被引量:21
标识
DOI:10.1016/j.ceramint.2022.07.040
摘要

The composition and synthesis approach of high entropy ceramics have significant influences on their microstructures and mechanical properties. A new (Hf0.2Zr0.2Ta0.2V0.2Nb0.2)B2 high entropy diboride ceramic with excellent mechanical properties was successfully prepared by spark plasma sintering (SPS) at a relatively “low temperature” (1800 °C) in this work. The effects of two mixing strategies, grinding and ball milling, on the solid solubility of the calcined powders were studied. Furthermore, the effects of these two mixing strategies on the phase and morphology of the calcined powders and the mechanical properties of the SPS sintered ceramics were analyzed. Experimental results indicated that, compared with a single solid solution phase within the high entropy boride powders obtained by ball milling, incomplete solid-solution presented in the high entropy boride powders obtained using grinding treatment. It promoted the solid-state diffusion and in-situ reaction of the diborides in the ceramics during the sintering process, thereby improving the densification and the hardness of the high entropy diboride ceramics. By grinding treatment, (Hf0.2Zr0.2Ta0.2V0.2Nb0.2)B2 high entropy ceramic with a relative density of 94% and a hardness of up to 25.34 ± 1.5 GPa at an indentation load of 9.8 N was obtained at 1800 °C. This work not only expanded the family of high-entropy diboride ceramics but also proved the advantage of grinding treatment in preparation of high entropy diboride ceramics.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
1秒前
1秒前
3秒前
nni完成签到,获得积分10
4秒前
4秒前
俏皮的鼠标完成签到,获得积分10
4秒前
4秒前
6秒前
6秒前
Ava应助吃吃吃咕叽采纳,获得10
6秒前
yang完成签到,获得积分10
8秒前
8秒前
澡雪发布了新的文献求助10
8秒前
nemuruinu应助dongdong采纳,获得10
8秒前
9秒前
Endeavor发布了新的文献求助10
9秒前
爆米花应助philospipi采纳,获得10
9秒前
10秒前
沉默毛衣完成签到,获得积分10
11秒前
棒棒发布了新的文献求助150
11秒前
开心超人发布了新的文献求助10
11秒前
13秒前
打打应助17采纳,获得10
14秒前
FashionBoy应助认真银耳汤采纳,获得10
15秒前
17秒前
矮小的笑旋完成签到,获得积分10
17秒前
英姑应助Zkxxxx采纳,获得30
18秒前
9464完成签到 ,获得积分10
19秒前
19秒前
领导范儿应助贪玩的万仇采纳,获得30
21秒前
嘻嘻嘻完成签到,获得积分10
21秒前
21秒前
一点通发布了新的文献求助10
22秒前
张雷应助二艺采纳,获得20
22秒前
22秒前
李凌霄发布了新的文献求助10
24秒前
24秒前
26秒前
JamesPei应助will_fay采纳,获得10
26秒前
神勇的人雄完成签到,获得积分10
26秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3975755
求助须知:如何正确求助?哪些是违规求助? 3520108
关于积分的说明 11200829
捐赠科研通 3256492
什么是DOI,文献DOI怎么找? 1798298
邀请新用户注册赠送积分活动 877509
科研通“疑难数据库(出版商)”最低求助积分说明 806403