Evaluation of Fracture Toughness of Plasma Electrolytic Oxidized Al2O3-ZrO2 Coatings Utilizing Nano-Scratch Technique

材料科学 等离子体电解氧化 立方氧化锆 涂层 断裂韧性 复合材料 铝酸盐 陶瓷 合金 腐蚀 电解质 冶金 电极 物理化学 化学 水泥
作者
Mehri Hashemzadeh,Frank Simchen,Lisa Winter,Thomas Lampke
出处
期刊:Coatings [MDPI AG]
卷期号:13 (4): 799-799 被引量:4
标识
DOI:10.3390/coatings13040799
摘要

Al2O3 coatings, which can be produced by plasma electrolytic oxidation (PEO) on aluminum substrates, provide an excellent protection against corrosion and wear. However, due to the brittle nature of the oxide ceramic, the fracture toughness is limited. One approach to enhance the tolerance to fracture is the incorporation of ZrO2 to form zirconia toughened alumina (ZTA). In addition to its use as a bulk material, the application as a coating material enables a broader field of application. In this study, an Al2O3-ZrO2 composite coating was applied on a 6082 aluminum alloy using an aluminate-phosphate-based electrolytic solution containing a Zr-based salt. Polarization measurement as an indicator of the passivability of a given system revealed that Zr-based salt improves the passivation of the aluminum alloy. The coatings’ characteristics were evaluated by SEM, EDS, and XRD. ZrO2 incorporated into alumina as a metastable high-temperature modification led to a thicker coating with new morphologies including lamellar and dendritic structures. Nano-indentation showed that the incorporated Zr increase the average hardness of the compact layer from 16 GPa to 18 GPa. The fracture toughness of the coatings was investigated locally with nano-scratches applied on the compact outer layer of the coatings’ cross-sections. The Zr-containing electrolytic solution resulted in a coating with significantly higher fracture toughness (6.9 MPa∙m1/2) in comparison with the Zr-free electrolytic solution (4.6 MPa∙m1/2). Therefore, it is shown, that the PEO process stabilized a high-temperature allotrope of zirconia at room temperature without the need for rare-earth dopants such as Y2O3. Furthermore, it was demonstrated that the nano-scratch method is a suitable and accurate technique for the investigation of the fracture toughness of coatings with inherent cracks.
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
大幅提高文件上传限制,最高150M (2024-4-1)

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
2秒前
kkmedici完成签到,获得积分20
3秒前
3秒前
6秒前
6秒前
小肥春发布了新的文献求助10
7秒前
7秒前
8秒前
绕世界流浪给绕世界流浪的求助进行了留言
8秒前
呜呜呜发布了新的文献求助10
9秒前
华仔应助楠瓜采纳,获得10
11秒前
11秒前
皮卡龙猫发布了新的文献求助10
11秒前
liv应助molemole采纳,获得10
11秒前
12秒前
12秒前
12秒前
14秒前
15秒前
JINHAOTING发布了新的文献求助10
16秒前
tianya发布了新的文献求助10
17秒前
赶路人发布了新的文献求助10
18秒前
大Doctor陈发布了新的文献求助10
21秒前
22秒前
科研旺完成签到,获得积分10
24秒前
隐形曼青应助米仁采纳,获得10
31秒前
舒适的梦玉完成签到,获得积分10
31秒前
32秒前
33秒前
华仔应助CC2333采纳,获得10
34秒前
英姑应助AMAME12采纳,获得10
34秒前
ruyingxia完成签到,获得积分10
36秒前
大Doctor陈发布了新的文献求助10
37秒前
40秒前
43秒前
sunny发布了新的文献求助200
44秒前
小土发布了新的文献求助10
46秒前
CC2333发布了新的文献求助10
46秒前
buyi完成签到,获得积分10
48秒前
48秒前
高分求助中
Manual of Clinical Microbiology, 4 Volume Set (ASM Books) 13th Edition 1000
Teaching Social and Emotional Learning in Physical Education 900
The three stars each : the Astrolabes and related texts 550
Boris Pesce - Gli impiegati della Fiat dal 1955 al 1999 un percorso nella memoria 500
Chinese-English Translation Lexicon Version 3.0 500
Recherches Ethnographiques sue les Yao dans la Chine du Sud 500
Two-sample Mendelian randomization analysis reveals causal relationships between blood lipids and venous thromboembolism 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 有机化学 工程类 生物化学 纳米技术 物理 内科学 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 电极 光电子学 量子力学
热门帖子
关注 科研通微信公众号,转发送积分 2398586
求助须知:如何正确求助?哪些是违规求助? 2099850
关于积分的说明 5293382
捐赠科研通 1827544
什么是DOI,文献DOI怎么找? 910958
版权声明 560061
科研通“疑难数据库(出版商)”最低求助积分说明 486910