稀有金属材料与工程最新文献_第3页

Effect of Trace Elements La, Ti and Homogenization on Electrical Properties of Pure Aluminum 微量元素La、Ti及均匀化对纯铝电性能的影响

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-11-01 DOI: 10.1016/S1875-5372(18)30229-7

Wei Feng , Mao Jian , Liu Chunfang , Liu Huihua

{"title":"Effect of Trace Elements La, Ti and Homogenization on Electrical Properties of Pure Aluminum","authors":"Wei Feng , Mao Jian , Liu Chunfang , Liu Huihua","doi":"10.1016/S1875-5372(18)30229-7","DOIUrl":"10.1016/S1875-5372(18)30229-7","url":null,"abstract":"<div><p>Al-La, Al-Ti and Al-La-Ti alloys were prepared to study the effects of Ti and La on the electrical conductivity and strength of alloys. The electrical conductivity, strength and microstructure evolution of alloys before and after homogenization treatment at 500 °C for 8 h were investigated. The results show that when the content of La does not exceed 0.3 wt%, the electrical conductivity of Al-La can keep a high level as 60.35% IACS due to the precipitation of the compounds containing La, Si and Fe. The strength of Al-Ti alloy is rapidly enhanced with the increase of Ti due to the increasing content of Ti atoms in the α-Al solution. When La and Ti are added simultaneously, the strength of alloys is higher than that of Al-La alloys, and the electrical conductivity is decreased compared with that of Al-La alloys but is higher than that of the Al-Ti alloy, which is mainly attributed to the formation of the new secondary phase Ti<sub>2</sub>Al<sub>20</sub>La. Homogenization treatment has little effect on the microstructure of alloys but reduces the number of casting defects, thereby increasing the electrical conductivity of all samples.</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 11","pages":"Pages 3257-3263"},"PeriodicalIF":0.7,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1875-5372(18)30229-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74936246","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: 6

Effect of Substrate Pulse Bias Voltage on the Microstructure and Mechanical and Wear-resistant Properties of TiN/Cu Nanocomposite Films 衬底脉冲偏置电压对TiN/Cu纳米复合膜微观结构和力学耐磨性能的影响

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-11-01 DOI: 10.1016/S1875-5372(18)30233-9

Zhao Yanhui , Zhao Shengsheng , Ren Ling , V.V. Denisov , N.N. Koval , Yang Ke , Yu Baohai

{"title":"Effect of Substrate Pulse Bias Voltage on the Microstructure and Mechanical and Wear-resistant Properties of TiN/Cu Nanocomposite Films","authors":"Zhao Yanhui , Zhao Shengsheng , Ren Ling , V.V. Denisov , N.N. Koval , Yang Ke , Yu Baohai","doi":"10.1016/S1875-5372(18)30233-9","DOIUrl":"10.1016/S1875-5372(18)30233-9","url":null,"abstract":"<div><p>TiN/Cu nanocomposite films were deposited on high-speed steel (HSS) substrates by axial magnetic field-enhanced arc ion plating (AMFE-AIP). The effects of substrate bias voltage on chemical composition, microstructure, mechanical and tribological properties of the films were investigated by X-ray photoelectrons spectroscopy (XPS), X-ray diffraction (XRD), nanoindentation and wear measurements, respectively. The results show that the Cu content increases first and then decreases with the increase of the pulse bias voltage, being a low value in the range of 1.3 at%∼2.1 at%. XRD results show that only the TiN phase appears in all the films, and no Cu phase is observed. The preferred orientation of the films changes significantly with the increasing pulse bias voltage. A maximum value of hardness of 36 GPa is obtained under a pulse bias voltage of −200 V, corresponding to the film containing 1.6 at% Cu. Compared to the pure TiN film, the Cu addition in TiN films significantly improves the wear resistance.</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 11","pages":"Pages 3284-3288"},"PeriodicalIF":0.7,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1875-5372(18)30233-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74881661","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: 5

Photocatalytic Activity and Photodegradation Rate Constant of Au-TiO2 Nanofilms by Magnetron Sputtering 磁控溅射制备Au-TiO2纳米膜的光催化活性和光降解速率常数

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-11-01 DOI: 10.1016/S1875-5372(18)30238-8

Kong Shaoqi, Song Xuanmin, Zhang Chunwang, Wang Wei, Yan Guochao

引用次数: 3

Improvement of the Piezomagnetic Measurement and Characterization Method of Fe-based Amorphous Alloy Ribbons and Their Piezomagnetic Properties 铁基非晶合金带压磁测量与表征方法的改进及其压磁性能

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-11-01 DOI: 10.1016/S1875-5372(18)30230-3

Chen Jie, Zhu Zhenghou, Bai Ruru, Lin Qianying

{"title":"Improvement of the Piezomagnetic Measurement and Characterization Method of Fe-based Amorphous Alloy Ribbons and Their Piezomagnetic Properties","authors":"Chen Jie, Zhu Zhenghou, Bai Ruru, Lin Qianying","doi":"10.1016/S1875-5372(18)30230-3","DOIUrl":"10.1016/S1875-5372(18)30230-3","url":null,"abstract":"<div><p>A new improved test system was developed based on the non-contact inductance method, which can be used to characterize the piezomagnetic properties of Fe-based amorphous alloy ribbons properly. The studies show that when the test frequency is 1 kHz, the voltage is 0.3 V and the compressive stress σ ≤ 0.1 MPa, the amorphous magnetic material of Fe<sub>73.5</sub>Cu<sub>1</sub>Nb<sub>3</sub>Si<sub>13.5</sub>B<sub>9</sub> has excellent piezomagnetic properties, and its ribbons of different specifications exhibit perfect stability and repeatability after repeated experiments. The ribbons are extremely sensitive to tiny stress, and they show a rapidly rising trend of the inductance once the initial pressure is applied on the ribbons. Moreover, the further amplifying experiment indicates that the sensitivity range is 0∼1.5 kPa. In addition, the size of Fe<sub>73.5</sub>Cu<sub>1</sub>Nb<sub>3</sub>Si<sub>13.5</sub>B<sub>9</sub> ribbons influence significantly the piezomagnetic property, and the initial inductance and its corresponding <em>S</em><sub>I-Max</sub> value of the ribbons increase substantially along with the sample size increasing; with the same width, the piezomagnetic property is superior to others while the thickness is 33∼36 µm, and <em>S</em><sub>I-Max</sub> is 19.8%. With the same thickness, the ribbons with a width of 20 mm show an excellent piezomagnetic property and the <em>S</em><sub>I-Max</sub> has reached 22.02%.</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 11","pages":"Pages 3264-3271"},"PeriodicalIF":0.7,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1875-5372(18)30230-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80415366","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

Recrystallization Behavior of Single-crystal Hollow Blade Tenon 单晶空心叶片榫的再结晶行为

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-11-01 DOI: 10.1016/S1875-5372(18)30237-6

Liang Xiangfeng, Zhao Yutao, Jia Zhihong, Xu Weitai, Zhang Li

{"title":"Recrystallization Behavior of Single-crystal Hollow Blade Tenon","authors":"Liang Xiangfeng, Zhao Yutao, Jia Zhihong, Xu Weitai, Zhang Li","doi":"10.1016/S1875-5372(18)30237-6","DOIUrl":"10.1016/S1875-5372(18)30237-6","url":null,"abstract":"<div><p>In order to better understand the effect of the temperature and load on recrystallization behavior of DD5 single-crystal hollow blade tenon, samples with different loads were heat treated at different solution temperatures in a furnace. Optical microscope and scanning electron microscope were used to study the microstructure of recrystallization and size distribution of γ′ phase after solution treatment. Results show that there are no new grains found after solution treatment at 1230 °C/4 h, air cooling. However, the depth of load affected area increases with the bearing load and the size and depth of recrystallized cellular structure with newly-formed γ′ phase particles increase with the load below the solution temperature. Besides, the recrystallized nuclei begin from the dendrite when the solution treatment is 1315 °C/4 h, air cooling. The dendrite arms are passivated and the boundary between dendrite arm and interdendritic space disappear and γ/γ′ phase eutectic structure exists between dendrites in the recrystallization area. Moreover, the recrystallization area and the primary dendritic size gradually increase with the increase in load above the solution temperature.</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 11","pages":"Pages 3309-3315"},"PeriodicalIF":0.7,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1875-5372(18)30237-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84243797","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: 3

Effects of Heat Treatment on Microstructure and Mechanical Properties of As-extruded Mg-Zn-Y-Zr Alloy 热处理对as挤压Mg-Zn-Y-Zr合金组织和力学性能的影响

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-11-01 DOI: 10.1016/S1875-5372(18)30242-X

Wang Dayu, Du Zhiming, Zhang Hongjuan

{"title":"Effects of Heat Treatment on Microstructure and Mechanical Properties of As-extruded Mg-Zn-Y-Zr Alloy","authors":"Wang Dayu, Du Zhiming, Zhang Hongjuan","doi":"10.1016/S1875-5372(18)30242-X","DOIUrl":"10.1016/S1875-5372(18)30242-X","url":null,"abstract":"<div><p>The effects of different heat treatment parameters on the microstructure and mechanical property of as-extruded Mg-4.8Zn-1.2Y-0.4Zr magnesium alloy were described based on the experimental results and analyses. The results indicate that the microstructure of the alloy changes obviously during heat treatment process. After T4 solution treatment, although the alloy grains grow obviously, the plasticity of the alloy is enhanced greatly. This is mainly due to the massive fish-bone W-phase decomposed into fine granular W phase, which reduces the pinning effect of the grain boundary. After T5 heat treatment, besides W-phase, there is a small amount of Mg-Zn phase precipitated in the alloy, which can improve the performance of the alloy. After T6 heat treatment, the W-phase has been almost completely decomposed into Mg-Zn and Mg-Y phase. The dispersively distributed phases greatly improve the strength and plasticity, which increases the ultimate tensile strength and elongation from 311 MPa and 16.89% in as-extruded alloy to 374 MPa and 21.97%, respectively. At last the most suitable scheme for heat treatment of Mg-4.8Zn-1.2Y-0.4Zr magnesium alloy is (500 °C/2 h+200 °C/48 h).</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 11","pages":"Pages 3345-3352"},"PeriodicalIF":0.7,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1875-5372(18)30242-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72380447","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

Effect of Minimum Temperature on the Mechanical Properties and Reversed Austenite Content of 9%Ni Steel Subjected to Cryogenic Treatment 低温处理对9%Ni钢力学性能和反奥氏体含量的影响

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-11-01 DOI: 10.1016/S1875-5372(18)30232-7

Gu Kaixuan , Wang Junjie , Zhang Hong , Guo Jia

{"title":"Effect of Minimum Temperature on the Mechanical Properties and Reversed Austenite Content of 9%Ni Steel Subjected to Cryogenic Treatment","authors":"Gu Kaixuan , Wang Junjie , Zhang Hong , Guo Jia","doi":"10.1016/S1875-5372(18)30232-7","DOIUrl":"10.1016/S1875-5372(18)30232-7","url":null,"abstract":"<div><p>The effect of minimum temperature on the mechanical properties and reversed austenite content of 9%Ni steel subjected to cryogenic treatment was experimentally investigated. Cryogenic treatment with different temperatures and soaking time were conducted by combining with the newly developed quenching, lamellarizing and tempering (QLT) heat treatment of 9% Ni steel. The results show that the cryogenic treatment at −80 and −110 °C has no obvious influence on the reversed austenite content and mechanical properties of 9%Ni steel. However, the room temperature impact toughness is improved by cryogenic treatment at −140 °C for 24 h, which is attributed to the modification in the reversed austenite morphology from bulks into strips. The volume fraction of the reversed austenite decreases slightly due to the isothermal martensitic transformation at −140 °C. Cryogenic treatment at −196 °C for 24 h increases the volume fraction of reversed austenite and refines the secondary martensite lath, thereby improving both the room temperature impact toughness and cryogenic ductility. The observed results are mainly due to the precipitation of ultra-fine carbides and the increase of internal stress during cryogenic treatment, which provides more nucleation sites for the reversed austenite in the process of tempering.</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 11","pages":"Pages 3277-3283"},"PeriodicalIF":0.7,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1875-5372(18)30232-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85389722","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: 2

Surface Microstructure and Anti-wear of WC-CoCr Coatings Cladded by Electron Beam 电子束包覆WC-CoCr涂层的表面组织及抗磨性能

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-11-01 DOI: 10.1016/S1875-5372(18)30241-8

Liu Hailang , Wang Bo , Qi Zhengwei , Zhang Guopei , Wang Dezhi

{"title":"Surface Microstructure and Anti-wear of WC-CoCr Coatings Cladded by Electron Beam","authors":"Liu Hailang , Wang Bo , Qi Zhengwei , Zhang Guopei , Wang Dezhi","doi":"10.1016/S1875-5372(18)30241-8","DOIUrl":"10.1016/S1875-5372(18)30241-8","url":null,"abstract":"<div><p>Nickel based alloy has good corrosion resistance in chloride medium, but its wear resistance is insufficient. In this paper, WC-CoCr coatings were deposited on Inconel617 alloy surface by HVOF (high velocity oxygen fuel). Electron beam remelting process was explored to modify the morphology and the phase composition of the coated layer. The results show that some structural defects of the as-sprayed coating are improved after electron beam treatment. Tribological tests concerning the sliding wear behavior of the tested materials reveal a significant decrease in the wear rate for the alloyed surface in comparison with the base material. After high energy electron beam treatment, the micro-hardness (HV<sub>0.3</sub>) of the surface is 11000 MPa which is about 2 times as much as that of the matrix (5500 MPa) due to the formation of new phase (especially the Co<sub>6</sub>W<sub>6</sub>C phase) with high hardness. Besides the amount of porosity of the coatings is reduced and the grain is refined. EDS spectrum analysis indicates that new elements occur in the proliferation of cladding layer and the substrate achieves a good metallurgical bonding with the coating. Moreover, the corrosion resistance of the cladding layer in salt water is higher than that of the matrix.</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 11","pages":"Pages 3338-3344"},"PeriodicalIF":0.7,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1875-5372(18)30241-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74955682","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: 6

Synergistic Effect of Sr and Ca Combined Additions on the Microstructure of A390 Aluminum Alloy Sr和Ca复合添加剂对A390铝合金组织的协同作用

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-11-01 DOI: 10.1016/S1875-5372(18)30236-4

Zhang Jiahong , Xing Shuming , Han Qingyou , Guo Qiang , Wang Rufen

引用次数: 1

Effect of Substrate Pre-carburizing on Properties of TiN (Ti) Hard Coatings Deposited on Ti-6Al-4V Alloy 基体预渗碳对Ti- 6al - 4v合金TiN (Ti)硬质镀层性能的影响

IF 0.7 4区材料科学

稀有金属材料与工程 Pub Date : 2018-11-01 DOI: 10.1016/S1875-5372(18)30235-2

Wang Yanfeng , Li Zhengxian , Li Wei , Du Jihong , Ji Shouchang , Zhang Changwei

{"title":"Effect of Substrate Pre-carburizing on Properties of TiN (Ti) Hard Coatings Deposited on Ti-6Al-4V Alloy","authors":"Wang Yanfeng , Li Zhengxian , Li Wei , Du Jihong , Ji Shouchang , Zhang Changwei","doi":"10.1016/S1875-5372(18)30235-2","DOIUrl":"10.1016/S1875-5372(18)30235-2","url":null,"abstract":"<div><p>Interface fracture often occurs in systems of soft substrate and hard coatings during the service process, which is related to the weak interface strength and the unstable expansion of cracks along the interface induced by the residual thermal stress. The residual thermal stress mainly comes from the mismatch of thermal physical properties between matrix and hard coatings. In this study, a gradient carburized layer was prepared on TC4 substrate before the deposition of TiN(Ti) coatings using double glow plasma carburization. And then the mono- and multilayer TiN(Ti) coatings were synthesized on the carburized layer, forming composite hard coatings. The effect of substrate carburizing on properties of coatings was studied. The results show that the composite coatings' hardness can be increased nearly 2 times and the bonding strength is enhanced to over 80 N, compared with that of mono-and multilayer TiN(Ti) coatings. Also the interface brittle fracture tendency is restrained obviously by the hardened substrate, and the coordinative deformation ability of the coating at extra load is optimized. The composite coating composed of pre-carburized layer and TiN hard coating shows a higher strength and toughness.</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 11","pages":"Pages 3295-3300"},"PeriodicalIF":0.7,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1875-5372(18)30235-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87161621","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: 4