Processing and Application of Ceramics最新文献

Low-temperature dielectric and impedance properties of Ba1-xSrxTiO3 and BaTi1-xTaxO3 ceramics Ba1-xSrxTiO3和BaTi1-xTaxO3陶瓷的低温介电和阻抗特性

4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2303286w

Depeng Wang, Ruifeng Niu, Liqi Cui, Weitian Wang

引用次数: 0

Effect of grain growth in bimodal microstructure on cutting performance of self-toughening Dy-α-SiAlON ceramic tool inserts 双峰组织晶粒长大对自增韧Dy-α-SiAlON陶瓷刀具切削性能的影响

4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2303321g

Beichen Gao, Weinila Abulaiti, Zheng Guan, Limeng Liu

{"title":"Effect of grain growth in bimodal microstructure on cutting performance of self-toughening Dy-α-SiAlON ceramic tool inserts","authors":"Beichen Gao, Weinila Abulaiti, Zheng Guan, Limeng Liu","doi":"10.2298/pac2303321g","DOIUrl":"https://doi.org/10.2298/pac2303321g","url":null,"abstract":"Although significant increase in mechanical properties has been achieved in ?-SiAlON ceramics by introducing self-toughening bimodal microstructure, the bimodal microstructure may not always result in better cutting performance of ?-SiAlON tool inserts. Herein Dy-?-SiAlON ceramics were prepared by hot-pressing at 1900?C under 30MPa. Diameter and aspect ratio of the large elongated ?-SiAlON grains pivotal to formation of bimodal microstructures were regulated by using 0-5wt.% Dy2O3 as a sintering additive. Mechanical properties and cutting performance of ?-SiAlON tool inserts were evaluated. The results showed good Vickers hardness (19.0-19.7GPa) and fracture toughness (3.61-4.18MPa?m1/2) increasing with crack propagation length. However, transverse section of the large elongated grains was revealed as critical crack to cause premature fracture of the ?-SiAlON ceramics. Fracture rather than attrition wear was recognized as dominant mechanism for tool failure, indicating that for better cutting performance of the ?-SiAlON tool inserts a selftoughening microstructure consisting of thinner grains with large aspect ratio is required.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135312345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of polycrystalline cubic boron nitride composites under high pressure 高压制备多晶立方氮化硼复合材料

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2302157m

P. Mo, Jiarong Chen, Chao Chen, Haiqing Qin, F. Lin

引用次数: 0

Effect of Al2O3 on migration and distribution of chromium and chromium fixation effect in stainless-steel slag glass-ceramics Al2O3对不锈钢渣微晶玻璃中铬迁移分布及固铬效果的影响

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2301070z

Chuanbo Zhang, Z. Tong, Congcong Xu, Jiaxing Wang, Zhiheng Jia

{"title":"Effect of Al2O3 on migration and distribution of chromium and chromium fixation effect in stainless-steel slag glass-ceramics","authors":"Chuanbo Zhang, Z. Tong, Congcong Xu, Jiaxing Wang, Zhiheng Jia","doi":"10.2298/pac2301070z","DOIUrl":"https://doi.org/10.2298/pac2301070z","url":null,"abstract":"Stainless-steel slag was used to prepare glass-ceramics, which could solidify chromium (Cr) in the slag. The migration and distribution state of chromium in the slag during the preparation of the glass-ceramics have a great influence on the chromium fixation ability of the glass-ceramics. In this paper, the effects of Al2O3 content in the glass-ceramics on the migration and distribution of chromium during the nucleation and crystallization steps, and on the chromium fixation effect of the glass-ceramics were systematically studied. The results show that in the nucleation stage, with the increase of Al2O3 content, the number of chromium spinel (Cr-spinel) nanocrystals formed in the glass first increases and then decreases, and Cr in the glass phase gradually migrates to Cr-spinel nanocrystals. TEM and XPS analyses show that during crystallization, part of Cr in Cr-spinel diffuses into diopside lattice, and the other part of Cr still exists in Cr-spinel wrapped by diopside. Cr in the glass phase also diffuses and migrates into the diopside lattice with the formation of diopside crystals. The optimal Al2O3 content is 11.8wt.%, which results in 97.94wt.% of the total Cr being fixed in the diopside crystalline phase. The ability of chromium fixation is very high giving a very low Cr leaching concentration of 0.004mg/l. The research results provide theoretical and technical support for increased chromium fixation and realizing harmless and high-value utilization of stainless-steel slag.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68582840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure and optical properties of La-doped ZnO thin films at room temperature 室温下la掺杂ZnO薄膜的结构和光学性质

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2302107s

I. Sugihartono, B. Soegijono, E. Handoko, T. Tiam, A. Umar

引用次数: 0

Heavily doped high-entropy A2B2O7 pyrochlore 高掺杂高熵A2B2O7焦绿石

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2302113m

B. Matović, J. Maletaskic, V. Maksimović, J. Zagorac, Aleksandar Luković, Yuping Zeng, I. Cvijović-Alagić

引用次数: 0

Investigation of the effect of pressure, sintering temperature and time on silicon carbide microstructure 压力、烧结温度和时间对碳化硅显微组织影响的研究

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2302189y

Z. Yaşar, V. Delucca, R. Haber

引用次数: 0

Thermal fatigue characteristics of 8Y2O3-ZrO2, La2Zr2O7, La2(Zr0.7Ce0.3)2O7 and La2Ce2O7 thermal barrier coatings in duplex, multilayer functionally graded and multilayer configurations 8Y2O3-ZrO2、La2Zr2O7、La2(Zr0.7Ce0.3)2O7和La2Ce2O7热障涂层双相、多层功能梯度和多层结构的热疲劳特性

4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2303236p

Kirti Pasupuleti, Kevin Vattappara, Sylvester Gomes, Parvati Ramaswamy

{"title":"Thermal fatigue characteristics of 8Y2O3-ZrO2, La2Zr2O7, La2(Zr0.7Ce0.3)2O7 and La2Ce2O7 thermal barrier coatings in duplex, multilayer functionally graded and multilayer configurations","authors":"Kirti Pasupuleti, Kevin Vattappara, Sylvester Gomes, Parvati Ramaswamy","doi":"10.2298/pac2303236p","DOIUrl":"https://doi.org/10.2298/pac2303236p","url":null,"abstract":"La2Zr2O7, La2(Zr0.7Ce0.3)2O7 and La2Ce2O7 pyrochlore plasma sprayable powders were synthesized and plasma spray coated on steel plates with NiCrAlY bond coat. Three different configurations were used: duplex, multilayer functionally graded and multilayer, with different combinations of commercial 8% yttria stabilized zirconia (8YSZ) and NiCrAlY (bond coat) layers. The prepared coatings were compared with the standard duplex 8YSZ thermal barrier coatings (TBCs) with a goal to study their suitability to serve as TBCs. TBCs? layer thicknesses and interfaces were studied via SEM on polished cross section metallographic samples removed from the spray coated TBCs. Thermal fatigue resistance was evaluated by directing a gas flame on the ceramic surface at 1200 and 1400 ?C, followed by its rapid withdrawal and forced cooling by pedestal fan. The maximum number of thermal shock cycles the coatings could withstand before failure was determined. The multilayered TBCs with lanthanum cerate composition stacked with 8YSZ exhibited the superior thermal fatigue resistance characteristics compared to all other studied TBCs. The findings were correlated with the crystalline phases of the ceramic coatings, obtained via XRD, and discussed in the light of existing literature.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135263530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of phase evolution and dielectric properties of Sr2Mn0.7Sn0.3O4 Sr2Mn0.7Sn0.3O4的相演化及介电性能研究

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2302181n

G. Nirala, S. Upadhyay

{"title":"Study of phase evolution and dielectric properties of Sr2Mn0.7Sn0.3O4","authors":"G. Nirala, S. Upadhyay","doi":"10.2298/pac2302181n","DOIUrl":"https://doi.org/10.2298/pac2302181n","url":null,"abstract":"Ruddlesden-Popper oxide Sr2Mn0.7Sn0.3O4 was synthesized by solid state method by calcining at different temperatures between 1200 and 1500?C. The phase evolution during thermal treatments was investigated and it was shown that the powder calcined at 1500?C and ceramics sintered at 1500?C have single phase structure. Rietveld refinement of the XRD data confirmed tetragonal crystal structure having a = b = 3.9425 ? and c = 12.1230? lattice parameters and I4/mmm space group symmetry. Permittivity (?), impedance (Z*), dissipation factor (tan ?) and AC conductivity (?AC) of the samples were studied in the frequency range 1 kHz-2MHz and temperature range 60-600?C. An equivalent circuit comprising two parallel R-L elements and one constant phase element (CPE) model fitted the impedance data very well. Components of the equivalent circuit were correlated with compositional micro inhomogeneities in the sintered sample. Resonance-like feature observed in the dissipation factor at a particular temperature is attributed to the cancellation of capacitive and inductive reactants. Negative permittivity and loss of the sintered sample were compared with other ceramic oxides showing negative permittivity.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68583834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC La1.75Y0.25Mo2-xAlxO9-δ中温SOFC固体电解质的制备与表征

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2301031t

C. Tian, Minzheng Zhu, Lingbo Shao, Xiaoling Qu, Lejie Zhu, Chao Chen, Caoli Wang, Yang Liu

{"title":"Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC","authors":"C. Tian, Minzheng Zhu, Lingbo Shao, Xiaoling Qu, Lejie Zhu, Chao Chen, Caoli Wang, Yang Liu","doi":"10.2298/pac2301031t","DOIUrl":"https://doi.org/10.2298/pac2301031t","url":null,"abstract":"Yttrium and aluminium co-substitutions on lanthanum molybdate ceramics with the nominal formula La1.75Y0.25Mo2-xAlxO9-?? (LYMA, x = 0, 0.1, 0.2, 0.3 and 0.4) were synthesized by citric acid-nitrate combustion method and used for preparation of solid electrolyte for intermediate-temperature solid oxide fuel cells (ITSOFCs). Phase composition, structure, conductivity and electrical properties of LYMA have been investigated as a function of aluminium content by X-ray diffraction, scanning electron microscopy and electrochemical impedance spectroscopy, respectively. Experimental results showed that the substitution of La and Mo with appropriate amounts of Y and Al can effectively stabilize the ?-form of La2Mo2O9 at room temperature and inhibit its phase transition to ?-form. The LYMA synthesized by combustion method exhibited a better sinterability where relative density of the samples sintered at 950?C for 4 h was higher than 95%TD. The performance of the LYMA electrolyte was found to be related to Al-content. The La1.75Y0.25Mo1.8Al0.2O8.7 exhibited high oxide ion conductivity (?= 42mS/cm at 800?C) and low electrical activation energy (Ea = 1.18 eV). These preliminary results indicate that the LYMA is a promising electrolyte for IT-SOFCs.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68582686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1