Synthesis and Sintering最新文献_第5页

Role of SPS temperature and holding time on the properties of Ti3AlC2-doped TiAl composites SPS温度和保温时间对ti3alc2掺杂TiAl复合材料性能的影响

Synthesis and Sintering Pub Date : 2022-09-30 DOI: 10.53063/synsint.2022.2383

M. Akhlaghi, E. Salahi, S. A. Tayebifard, G. Schmidt

{"title":"Role of SPS temperature and holding time on the properties of Ti3AlC2-doped TiAl composites","authors":"M. Akhlaghi, E. Salahi, S. A. Tayebifard, G. Schmidt","doi":"10.53063/synsint.2022.2383","DOIUrl":"https://doi.org/10.53063/synsint.2022.2383","url":null,"abstract":"In order to study the effects of sintering conditions on the properties of TiAl-based materials, two different compositions (TiAl-15 wt% Ti3AlC2 and TiAl-25 wt% Ti3AlC2) were chosen and manufactured by spark plasma sintering at 900 ºC/7 min and 1000 ºC/15 min. The results showed that increasing the MAX phase content had positive effect on the relative density and mechanical properties, but simultaneous increasing the temperature and holding time is more effective in improvement of properties. For TiAl-15 wt% Ti3AlC2 sample, the relative density, Vickers hardness, fracture toughness, and bending strength increased from 92.3%, 3.6 GPa, 10.9 MPa.m1/2, and 206 MPa to 95.2%, 4.5 GPa, 12.0 MPa.m1/2, and 336 MPa, respectively, as the sintering temperature and holding time increased from 900 ºC/7 min to 1000 ºC/15 min. In the case of TiAl-25 wt% Ti3AlC2 sample, increasing the sintering temperature and holding time from 900 ºC/7 min to 1000 ºC/15 min led to the improvement of relative density, Vickers hardness, fracture toughness, and bending strength from 92.8%, 4.1 GPa, 11.2 MPa.m1/2, and 270 MPa to 97.5%, 4.6 GPa, 11.8 MPa.m1/2, and 340 MPa, respectively.","PeriodicalId":22113,"journal":{"name":"Synthesis and Sintering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80534943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

On the synthesis and sintering behavior of a novel Mg-Ca alloy, Part I: Mechanical alloying 一种新型镁钙合金的合成及其烧结性能，第一部分:机械合金化

Synthesis and Sintering Pub Date : 2022-09-30 DOI: 10.53063/synsint.2022.23118

Parisa Golmohammadi, F. Saljooghi, A. Bahmani, N. Parvin, Behzad Nayebi

引用次数: 1

Optimum temperature, time and atmosphere of precursor pyrolysis for synthesis of B4C ceramics 前驱体热解合成B4C陶瓷的最佳温度、时间和气氛

Synthesis and Sintering Pub Date : 2022-09-30 DOI: 10.53063/synsint.2022.23119

Seyed Faridaddin Feiz, L. Nikzad, H. Majidian, E. Salahi

引用次数: 2

Effect of glass waste as a cement replacement on the mechanical properties of concrete 玻璃废料替代水泥对混凝土力学性能的影响

Synthesis and Sintering Pub Date : 2022-09-27 DOI: 10.53063/synsint.2022.23120

S. Ahmadi

引用次数: 0

Banana-peel derived activated carbon for microwave absorption at X-band frequency 香蕉皮衍生的x波段微波吸收活性炭

Synthesis and Sintering Pub Date : 2022-09-18 DOI: 10.53063/synsint.2022.2389

Hojjatollah Soleimani, Jemilat Yetunde Yusuf, H. Soleimani, L. K. Chuan, M. Sabet

{"title":"Banana-peel derived activated carbon for microwave absorption at X-band frequency","authors":"Hojjatollah Soleimani, Jemilat Yetunde Yusuf, H. Soleimani, L. K. Chuan, M. Sabet","doi":"10.53063/synsint.2022.2389","DOIUrl":"https://doi.org/10.53063/synsint.2022.2389","url":null,"abstract":"The rapid advancement in information technology, communication, and electronic devices elevates the need to develop suitable materials for microwave absorption (MA) which should have the properties of an ideal microwave absorber. Porous activated carbon from agricultural wastes has piqued the interest of MA researchers due to their distinct properties such as good specific surface area, high dielectric loss, good electrical conductivity, and low density. Herein banana peel activated carbon was prepared by activating banana peel precursor with KOH and carbonizing at different temperatures. The difference in the porous structure with varying carbonization temperature was visible in the FESEM image, validated by BET analysis. The Banana Peel Activated carbon samples exhibited good microwave absorption performance, with BP-AC700 displaying a minimum Reflection Loss (RL) of −40.62 dB at 10.72 GHz & 3.0 mm thickness. In addition, the obtained effective absorption bandwidth of 3.5 GHz spanned through the X band frequency. This exceptional microwave absorption was attained due to the sample's good conductive loss and Porous favourable morphology. This study inspires the development of future facile functional agricultural waste-derived microwave absorbers.","PeriodicalId":22113,"journal":{"name":"Synthesis and Sintering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72975664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Investigation of flame retardancy properties of polypropylene-colemanite and intumescent flame retardant additive blends 聚丙烯-colemanite与膨胀型阻燃添加剂共混物的阻燃性能研究

Synthesis and Sintering Pub Date : 2022-09-10 DOI: 10.53063/synsint.2022.2397

Merve Kahraman, N. Kızılcan

{"title":"Investigation of flame retardancy properties of polypropylene-colemanite and intumescent flame retardant additive blends","authors":"Merve Kahraman, N. Kızılcan","doi":"10.53063/synsint.2022.2397","DOIUrl":"https://doi.org/10.53063/synsint.2022.2397","url":null,"abstract":"Polypropylene (PP) represents a considerable proportion of polyolefins (PO) used in different industrial applications such as automobile components, textiles, packaging, insulation, medical devices, various housewares and household appliances due to its efficient cost, desirable mechanical, thermal and electrical properties, easy processability and recyclability. Because of its carbonaceous structure, PP is a highly flammable material with a LOI value of 18 that presents serious fire hazard. In this research, Intumescent flame retardant (IFR) and colemanite were added to polypropylene to compose 30% of the total mass of the polymeric compounds and the synergistic effect of colemanite with intumescent flame retardant (IFR) additive in PP was investigated by limiting oxygen index (LOI), glow wire test (GWT), UL-94 test and mechanical properties measurements. The LOI, UL 94 and glow wire test results showed that colemanite had a significant effect on flame retardancy and LOI value which can reach to 37.6 % with loading level of 2 wt.% colemanite at the total amount of flame retardant additives kept constant at 30 wt.%. Additionally, the PP/IFR compounds passed UL 94 V0 rating and both 750 °C and 850 °C glow wire tests and with 2-8 wt.% colemanite loading. According to TGA analyses, the results indicated that colemanite improved the thermal stability of PP/IFR compounds and also promoted the formation of char layer. When colemanite mineral added to polypropylene without IFR system, it has no effect on flame retardancy properties of polypropylene. When all properties have been taken into consideration, colemanite can be used up to 6 wt% in IFR.","PeriodicalId":22113,"journal":{"name":"Synthesis and Sintering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85076591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Al content on microstructure and optical transmittance of sol-gel dip-coated ZnO films Al含量对溶胶-凝胶浸渍ZnO薄膜微观结构和透光率的影响

Synthesis and Sintering Pub Date : 2022-08-12 DOI: 10.53063/synsint.2022.2396

M. Tonka, Feyza Guzelcimen, N. Baydogan

引用次数: 0

Development of cordierite-based glass-ceramics by slip casting through selecting the appropriate sintering conditions 通过选择合适的烧结条件，研制了堇青石基微晶玻璃

Synthesis and Sintering Pub Date : 2022-06-29 DOI: 10.53063/synsint.2022.22116

M. Maleki, H. Majidian, S. Banijamali, Mohammed Zakeri

{"title":"Development of cordierite-based glass-ceramics by slip casting through selecting the appropriate sintering conditions","authors":"M. Maleki, H. Majidian, S. Banijamali, Mohammed Zakeri","doi":"10.53063/synsint.2022.22116","DOIUrl":"https://doi.org/10.53063/synsint.2022.22116","url":null,"abstract":"The present work aims to prepare a dense cordierite-based glass-ceramic through slip casting and consequent heat treatment procedures. In this regard, sintering conditions were considered as the key variables to improve the properties of the glass-ceramic. For this purpose, glass frit powder was prepared through melting oxide powders (in the system of SiO2-Al2O3-TiO2-K2O-CaO-MgO). The mixed powders were then heat treated at 1450 °C for 1 hour and quenched in water. The glass frit powder was slip cast using the appropriate dispersant. Sintering was carried out by one-step, two-step, and three-step procedures. Specimens were characterized in terms of various analysis techniques including dilatometry, X-ray diffractometry, scanning electron microscopy, and mechanical strength measurement. Among the examined specimens, the sample sintered by a three-step approach was considered the optimized one which attained zero porosity. According to the obtained results, cordierite crystals were observable in this glass-ceramic matrix. A low coefficient of thermal expansion and a low dielectric constant were observed for the optimized glass-ceramic sample. The obtained results confirmed that the homogenous distributions of crystalline phases are responsible for the appropriate and desirable properties of the prepared glass-ceramic.","PeriodicalId":22113,"journal":{"name":"Synthesis and Sintering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88332181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reactive spark plasma sintering of ZrB2-TiC composites: Role of nano-sized carbon black additive 反应放电烧结ZrB2-TiC复合材料:纳米炭黑添加剂的作用

Synthesis and Sintering Pub Date : 2022-05-21 DOI: 10.53063/synsint.2022.22107

Hamid Istgaldi, M. Mehrabian, F. Kazemi, Behzad Nayebi

{"title":"Reactive spark plasma sintering of ZrB2-TiC composites: Role of nano-sized carbon black additive","authors":"Hamid Istgaldi, M. Mehrabian, F. Kazemi, Behzad Nayebi","doi":"10.53063/synsint.2022.22107","DOIUrl":"https://doi.org/10.53063/synsint.2022.22107","url":null,"abstract":"ZrB2-TiC composites with and without nano-sized carbon black as the sintering additive were densified through spark plasma sintering at 1900 °C for 7 minutes under the applied pressure of 40 MPa. The role of carbon black in densification behavior, phase arrangement, microstructural characteristics and mechanical properties of the sintered composites were then investigated. While both of the composite samples were found to be fully sintered, the thermodynamic of the reactive sintering was also studied. Results indicated that whereas the reactive sintering process leads to complete consumption of TiC through the formation of the solid solution as the matrix in both of the composite samples, the presence of carbon black at the initial composition of the samples can result in remained carbon at the final microstructure. Besides the in-situ synthesized zirconium carbide as the major reinforcement phase, such a remained carbon can lead to significantly different mechanical behavior of the composites. Accordingly, the hardness of 21.8 and 24.3 GPa and the indentation fracture toughness of 3.3 and 4.5 MPa.m0.5 were obtained for carbon-black free and doped samples, respectively. The densification, hardening, and toughening mechanisms in both of the composite samples were finally discussed.","PeriodicalId":22113,"journal":{"name":"Synthesis and Sintering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89136546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Ultrasonic properties of Ni–Fe–B4C cermets produced by tube furnace sintering 管炉烧结法制备Ni-Fe-B4C陶瓷的超声性能

Synthesis and Sintering Pub Date : 2022-04-18 DOI: 10.53063/synsint.2022.2287

Vildan Özkan Bilici

引用次数: 1