Transactions of Nonferrous Metals Society of China最新文献_第9页

A criterion of dimensional design to improve flame spread resistance of magnesium alloy components 提高镁合金部件抗火焰蔓延性能的尺寸设计标准

IF 4.5 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-04-01 DOI: 10.1016/S1003-6326(23)66458-1

Bo HU , Jia-xuan HAN , De-jiang LI , Zi-xin LI , Xiao-qin ZENG , Wen-jiang DING , Zhan-hong LIN , Chen JIN , Shou ZHAO

{"title":"A criterion of dimensional design to improve flame spread resistance of magnesium alloy components","authors":"Bo HU , Jia-xuan HAN , De-jiang LI , Zi-xin LI , Xiao-qin ZENG , Wen-jiang DING , Zhan-hong LIN , Chen JIN , Shou ZHAO","doi":"10.1016/S1003-6326(23)66458-1","DOIUrl":"https://doi.org/10.1016/S1003-6326(23)66458-1","url":null,"abstract":"<div>A criterion for predicting the flame spread time of stick-shaped Mg alloy samples was proposed based on the law of energy conservation. It is indicated that the flame spread time is mainly affected by the material and sample dimension. The initial temperature and ignition temperature of the control volume and the S/lc ratio (the cross-sectional area/cross-sectional circumference) of the sample are decisive for the flame spread time. The flame spread time is proportional to the ΔH (the energy required to heat a unit mass of sample from initial temperature to ignition temperature) and the S/lc ratio, which is confirmed in three Mg alloys of Mg–8.5Al–0.5Zn–0.2Mn, Mg–2.7Nd– 0.4Zn–0.6Zr and Mg–4.0Y–3.3Nd–0.5Zr. For samples with the same dimension, the Mg–8.5Al–0.5Zn–0.2Mn alloy sample possesses the largest ΔH and the longest flame spread time. For samples with constant length and cross-sectional area, the sample with circular cross-section has the largest S/lc ratio and the best flame spread resistance in the same alloy.</div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1003632623664581/pdf?md5=18348d93529ba47434bf5aed10e454bd&pid=1-s2.0-S1003632623664581-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140818680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oxidation resistance and thermal insulation performance of Al–Cr–O/Zr–O + NiCoCrAlSiY and Al–Cr–O + NiCoCrAlSiY coatings prepared by arc ion plating 电弧离子镀制备的 Al-Cr-O/Zr-O + NiCoCrAlSiY 和 Al-Cr-O + NiCoCrAlSiY 镀层的抗氧化性和隔热性能

IF 4.5 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-04-01 DOI: 10.1016/S1003-6326(24)66467-8

Li-jun XIAN , Hai-bo ZHAO , Hong-yuan FAN , Guang XIAN

{"title":"Oxidation resistance and thermal insulation performance of Al–Cr–O/Zr–O + NiCoCrAlSiY and Al–Cr–O + NiCoCrAlSiY coatings prepared by arc ion plating","authors":"Li-jun XIAN , Hai-bo ZHAO , Hong-yuan FAN , Guang XIAN","doi":"10.1016/S1003-6326(24)66467-8","DOIUrl":"https://doi.org/10.1016/S1003-6326(24)66467-8","url":null,"abstract":"<div>Al–Cr–O/Zr–O multilayer coating + NiCoCrAlSiY bond layer and Al–Cr–O single-layer coating + NiCoCrAlSiY bond layer were deposited on superalloy by arc ion plating, and subsequently they were heat treated at 1000–1200 °C. Scanning electron microscope and X-ray diffractometer were used to analyze the microstructure and phase of the coatings. The results showed that both the Al–Cr–O/Zr–O multilayer coating and Al–Cr–O single-layer coating exhibited a compact spherical structure. After heat treatment, cracks occurred on the surface of Al–Cr–O/Zr–O coating. Cracks increased and widened with rising the temperature. However, the surface cell clusters of Al–Cr–O coating after heat treatment were changed to tightly connected granular structures, and the granular structures grew up significantly with the increase of annealing temperature. Owing to the oxygen ion conductor and lower densification of t-ZrO2 than α-Al2O3, t-ZrO2 in the Al–Cr–O/Zr–O coating provided an access for the inward diffusion of oxygen. Therefore, the high temperature oxidation resistance of the Al–Cr–O coating + NiCoCrAlSiY layer was superior to that of the Al–Cr–O/Zr–O multilayer coating + NiCoCrAlSiY layer. The thermal insulation performance of Al–Cr–O/Zr–O multilayer coating + NiCoCrAlSiY layer was better than that of Al–Cr–O coating + NiCoCrAlSiY layer due to the large thickness and low thermal conductivity of t-ZrO2 phase and the heat reflection of interlayer interface.</div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1003632624664678/pdf?md5=8d279f21e4942669f623c731a7d2ad09&pid=1-s2.0-S1003632624664678-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140818698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of pre-stretch on microstructure, mechanical properties and corrosion resistance of 2A14 aluminum alloy 预拉伸对 2A14 铝合金微观结构、机械性能和耐腐蚀性的影响

IF 4.5 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-04-01 DOI: 10.1016/S1003-6326(23)66454-4

Lan-ping HUANG , Long-long HE , Song LI , Wen-sheng LIU , Jing HUANG , Song-yi CHEN

{"title":"Effects of pre-stretch on microstructure, mechanical properties and corrosion resistance of 2A14 aluminum alloy","authors":"Lan-ping HUANG , Long-long HE , Song LI , Wen-sheng LIU , Jing HUANG , Song-yi CHEN","doi":"10.1016/S1003-6326(23)66454-4","DOIUrl":"https://doi.org/10.1016/S1003-6326(23)66454-4","url":null,"abstract":"<div>The microstructure, mechanical properties and corrosion behaviors of the peak-aged 2A14 aluminum alloys subjected to pre-stretch prior to artificial aging were investigated. The results indicate that the hardness and strength of the peak-aged alloy can be greatly enhanced via introducing pre-stretch due to the formation of dense and finer θ′ precipitates with dispersed distribution in alloy matrix. Pre-stretch prior to peak aging evidently enhances the peak aging hardness and shortens the peak aging time of the alloy. A pre-stretching degree of 7.5% leads to a distinct inhomogeneous distribution of θ′ phase, which decreases the ultimate tensile strength. As pre-stretching degree increases, the plasticity, impact toughness and exfoliation corrosion (EXCO) resistance of the peak-aged alloy all gradually decrease, but its resistance to intergranular corrosion (IGC) increases and then decreases.</div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1003632623664544/pdf?md5=3f99fa40e5e7081f16f195ee4adbbf9e&pid=1-s2.0-S1003632623664544-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140818751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanism of catalyst on morphological evolution of Al(OH)3 during Al–H2O reaction Al-H2O 反应过程中催化剂对 Al(OH)3 形貌演变的影响机理

IF 4.5 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-04-01 DOI: 10.1016/S1003-6326(24)66476-9

Wen-qi TANG , Ji-yi ZHU , Hui SUN , Yong-fei JUAN , Chao-peng FU , Jian YANG , Jiao ZHANG

{"title":"Mechanism of catalyst on morphological evolution of Al(OH)3 during Al–H2O reaction","authors":"Wen-qi TANG , Ji-yi ZHU , Hui SUN , Yong-fei JUAN , Chao-peng FU , Jian YANG , Jiao ZHANG","doi":"10.1016/S1003-6326(24)66476-9","DOIUrl":"https://doi.org/10.1016/S1003-6326(24)66476-9","url":null,"abstract":"<div>The morphologies of Al(OH)3 crystals prepared via the Al–H2O reactions with various catalysts and the growth mechanisms of these crystals were investigated. The reaction was carried out with NaOH, KOH, tetramethylguanidine (TMG), and tetramethylammonium hydroxide (TMAH) as catalysts. The evolution of the obtained product was observed in situ, and the products obtained after 120 min of reaction have the shapes of the hexagonal prism, long-hexagonal prism, long rod, and irregular rod, respectively. In the NaOH and KOH systems, the products are gibbsite, and the gibbsite crystals grow along the (110), (001), and (100) faces in the NaOH system, and the (100), (102), and (110) faces in the KOH system. However, in the TMG and TMAH systems, the products are bayerite, and the bayerite crystals grow along the (110), (111), and (001) faces. It is worth mentioning that gibbsite has more Al—O bonds than bayerite, giving rise to the formation of columnar crystals.</div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1003632624664769/pdf?md5=6b514657b0634cf58c5f1ddf5d41f3c0&pid=1-s2.0-S1003632624664769-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140818727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cryogenic rolling impacts on microstructures and properties of a novel Ni–W–Co–Ta medium-heavy alloy 低温轧制对新型 Ni-W-Co-Ta 中重合金微观结构和性能的影响

IF 4.5 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-04-01 DOI: 10.1016/S1003-6326(24)66465-4

Kang-hao SHU , Yi XIONG , Yong LI , Yun YUE , Zheng-ge CHEN , Xiao-qin ZHA , Shun HAN , Chun-xu WANG

{"title":"Cryogenic rolling impacts on microstructures and properties of a novel Ni–W–Co–Ta medium-heavy alloy","authors":"Kang-hao SHU , Yi XIONG , Yong LI , Yun YUE , Zheng-ge CHEN , Xiao-qin ZHA , Shun HAN , Chun-xu WANG","doi":"10.1016/S1003-6326(24)66465-4","DOIUrl":"https://doi.org/10.1016/S1003-6326(24)66465-4","url":null,"abstract":"<div>A high-strength Ni–W–Co–Ta medium-heavy alloy (MHA) was prepared through the melting–casting–forging followed by cryogenic rolling process. Detailed microstructure and mechanical property characterizations were conducted to unveil the influence of cyrorolling on Ni–W–Co–Ta MHA. The results revealed that initial equiaxial grains were elongated along the rolling direction firstly and then transformed to fibrous texture with increase in accumulated deformation, in which a large number of slip bands were generated to coordinate the intensive plastic deformation. A sharp increase in dislocation density significantly promoted the dislocation interactions, which, in turn, refined the grains down to nanometer scale. The strength and hardness increased significantly with the increase of the deformation, whereas the elongation decreased sharply. The fracture morphology changed from a typical ductile mode for the undeformed sample gradually to quasi-cleavage and ductile mixed mode for 90% deformed material.</div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1003632624664654/pdf?md5=798e8c001f878f5936e55dace877c8c4&pid=1-s2.0-S1003632624664654-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140818696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanism of lithium adsorption by AlLi-LDH with Al–O octahedral ring 带有 Al-O 八面体环的 AlLi-LDH 吸附锂的机理

IF 4.5 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-04-01 DOI: 10.1016/S1003-6326(24)66474-5

Yong-pan TIAN, Cheng-cheng WANG, Fan ZHANG, Liang XU, Zhuo ZHAO, Bi-hai TONG

{"title":"Mechanism of lithium adsorption by AlLi-LDH with Al–O octahedral ring","authors":"Yong-pan TIAN, Cheng-cheng WANG, Fan ZHANG, Liang XU, Zhuo ZHAO, Bi-hai TONG","doi":"10.1016/S1003-6326(24)66474-5","DOIUrl":"https://doi.org/10.1016/S1003-6326(24)66474-5","url":null,"abstract":"<div>Aluminum–lithium layered double hydroxide (AlLi-LDH) was synthesized using a co-precipitation method for Li+ adsorption. AlLi-LDH crystallized in space group of P32 or C2/m, where the microstructure had regular spherical shapes with diameters of 5–10 μm. The space group of AlLi-LDH only belonged to P32 after Li+ adsorption. The Li+ adsorption from a solution with a Li+ concentration of 95.4 mg/L reached 8.98 mg/g after 1 h. The adsorption amount increased to 16.50 mg/g after 48 h, where the Li+ adsorption capacity determined by applying the second-order adsorption model was 17.57 mg/g. The Mg2+/Li+ separation coefficient was 29536 when the mass ratio of Mg2+ to Li+ was 1067. The interaction strength of Li–O was weaker for AlLi-LDH in the P32, where the interaction occurs via the electrostatic effect. The Li+ adsorption and desorption occurred more readily in AlLi-LDH belonging to P32 space group.</div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1003632624664745/pdf?md5=abfedd80476679898a498e6c46544458&pid=1-s2.0-S1003632624664745-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140818725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel creep model with synergetic Orowan bypassing and climbing mechanisms in nickel-base superalloys 镍基超级合金中具有协同奥罗旺旁路和爬升机制的新型蠕变模型

IF 4.5 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-04-01 DOI: 10.1016/S1003-6326(23)66461-1

Fang LI , Ding-ling YUAN , Kang-hua CHEN , Song-yi CHEN , Li LI

{"title":"A novel creep model with synergetic Orowan bypassing and climbing mechanisms in nickel-base superalloys","authors":"Fang LI , Ding-ling YUAN , Kang-hua CHEN , Song-yi CHEN , Li LI","doi":"10.1016/S1003-6326(23)66461-1","DOIUrl":"https://doi.org/10.1016/S1003-6326(23)66461-1","url":null,"abstract":"<div>A novel creep model was proposed to accurately and conveniently predict the steady-state creep rate of precipitation-strengthening nickel-base superalloys. Based on the space distribution of precipitates, the synergetic mode of Orowan bypassing and dislocation climbing mechanisms in dislocation–precipitate interaction was coupled into the new creep model according to probability–correlative method. The results show that the new model can accurately describe the steady-state creep rate compared with the experimental data, which is far better than the classical model. Moreover, the present model no longer relies on the adjustable parameters. The quantitative relationship between threshold stress and temperature is also determined. This work sheds new light on the dislocation–precipitate interaction during creep deformation, and provides an effective model for designing precipitation-strengthening alloys with improved creep properties.</div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1003632623664611/pdf?md5=f9c60ea08675ee5171acdd3b1c3dd6f0&pid=1-s2.0-S1003632623664611-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140818692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal insulation capability and adhesion strength of unpyrolyzed thick thermal barrier coatings 未水解厚隔热涂料的隔热能力和附着强度

IF 4.5 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-04-01 DOI: 10.1016/S1003-6326(24)66466-6

Mohammad IZADINIA , Reza SOLTANI , Mahmoud HEYDARZADEH SOHI , Javad MOSTAGHIMI

{"title":"Thermal insulation capability and adhesion strength of unpyrolyzed thick thermal barrier coatings","authors":"Mohammad IZADINIA , Reza SOLTANI , Mahmoud HEYDARZADEH SOHI , Javad MOSTAGHIMI","doi":"10.1016/S1003-6326(24)66466-6","DOIUrl":"https://doi.org/10.1016/S1003-6326(24)66466-6","url":null,"abstract":"<div>Thermal insulation capability and adhesion strength of thick thermal barrier coatings (TBC) produced by unpyrolyzed powder (UPTTBC) were compared with those of the conventional TBC, thick TBC (TTBC), and dense vertically cracked (DVC) TTBC. Thermal insulation capability was evaluated using temperature drop. The adhesion strengths of the coatings were also measured by pull-off test method according to ASTM C633. The results indicated that the adhesion strength of UPTTBC and DVC TTBC was 35% and 25% higher than that of the TTBC, respectively. This could imply that the non-melted areas with sub-micron dimensions in UPTTBC structure, act as a trap and prevent the cracks propagation. In addition, the results of thermal insulation tests showed that DVC TTBC coatings had the lowest thermal insulation capability with temperature drop rate of 0.28 °C/µm and UPTTBC coatings had the highest insulation capability with temperature drop rate of 0.40 °C/µm. Due to the presence of sub-micron zones in the microstructure of UPTTBCs, the coatings exhibited superior thermal insulation capability. In contrary, the DVC TTBC showed the lowest thermal insulation capability because of its dense structure.</div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1003632624664666/pdf?md5=bf1b5555106248fdc5b9fd22d7e0c5d7&pid=1-s2.0-S1003632624664666-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140818697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of W-doping on precursor growth of LiNi0.88Co0.09Mn0.03O2 and its electrochemical performance 掺杂 W 对 LiNi0.88Co0.09Mn0.03O2 的前驱体生长及其电化学性能的影响

IF 4.5 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-04-01 DOI: 10.1016/S1003-6326(24)66468-X

Lei CHENG , Yi ZHAO , Bin HUANG , Zao-wen ZHAO , Yan-wei LI , Wei LI

{"title":"Effects of W-doping on precursor growth of LiNi0.88Co0.09Mn0.03O2 and its electrochemical performance","authors":"Lei CHENG , Yi ZHAO , Bin HUANG , Zao-wen ZHAO , Yan-wei LI , Wei LI","doi":"10.1016/S1003-6326(24)66468-X","DOIUrl":"https://doi.org/10.1016/S1003-6326(24)66468-X","url":null,"abstract":"<div>W-doped LiNi0.88Co0.09Mn0.03O2 cathodes were fabricated by using W-doped precursors. X-ray diffraction indicates that W-doping suppresses the crystal growth of the precursor along the direction perpendicular to c-axis. Scanning electron microscopy results show that the primary particles of the cathode become finer with the increase of W-doping amount. Electrochemical measurements prove the merits of the W-doped cathodes. The one with 0.4 wt.% W-doping shows significantly improved electrochemical properties compared with the pristine one. After 100 charge–discharge cycles at a high rate of 10C, it exhibits capacity retentions of 94.68% and 89.63% at 25 and 45 °C, respectively. The intergranular cracks after cycles are also suppressed by W-doping. Hence, profiting from the synergistic effect of component regulation and microstructure engineering by W-doping, the Li+ diffusion kinetics is boosted, and the structural stability is enhanced.</div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S100363262466468X/pdf?md5=e7236c00c5c4092f50b4abd8fc4caba5&pid=1-s2.0-S100363262466468X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140818699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heterogeneous nucleation and dendritic growth of niobium under containerless electrostatic levitation 无容器静电悬浮条件下铌的异质成核和树枝状生长

IF 4.5 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-04-01 DOI: 10.1016/S1003-6326(24)66475-7

Yan-qiu WANG , Fu ZHENG , Xiao-xiao LU , Zhi-bin SUN

{"title":"Heterogeneous nucleation and dendritic growth of niobium under containerless electrostatic levitation","authors":"Yan-qiu WANG , Fu ZHENG , Xiao-xiao LU , Zhi-bin SUN","doi":"10.1016/S1003-6326(24)66475-7","DOIUrl":"https://doi.org/10.1016/S1003-6326(24)66475-7","url":null,"abstract":"<div>With the containerless electrostatic levitation method, the undercooling level and nucleation solidification mechanism of niobium samples of 99.7% and 99.95% in purity were comprehensively studied. The classical nucleation theory was used to measure and calculate the thermophysical and thermodynamic characteristics associated with the nucleation and solidification procedure. The measurement results show that the maximum undercooling of experimental samples is 455.7 K, while the hyper cooling limit of the niobium is derived at 739 K. The most probable nucleation undercooling, pre-exponential factor, nucleation activation energy, solid/liquid interface free energy, and the critical nucleus radius are determined. The dendrite growth velocity has a powerful relationship with undercooling, and the dendritic growth velocity of liquid niobium reaches 42.1 m/s at the undercooling of 454 K. The effect of the anisotropy of surface energy is taken into account, and the forecast results display excellent consistency with the experimental ones.</div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1003632624664757/pdf?md5=a9b8f315087cbda35e213ed3550acbb1&pid=1-s2.0-S1003632624664757-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140818726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0