Journal of Materials Research and Technology-Jmr&t最新文献

英文中文

High-toughness, low-constant epoxy/α-ZrP layered composites for advanced antenna packaging 用于先进天线封装的高韧性、低常数环氧/α-ZrP层状复合材料

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-11 DOI: 10.1016/j.jmrt.2025.12.115

Chaoyang Wu, Guojun Du, Wenqi Wang, Jianyang Yuan, Xiaoqing Du, Qihui Chen, Yaqing Liu

Antenna packaging, which is designed to protect electronic components and ensure long-term stability, often employs epoxy resin (EP) composites because high mechanical strength, low dielectric constant and ease of molding satisfy design requirements, yet the highly cross-linked molecular network which leads to poor fracture toughness. In this work, a lamellar aerogel scaffold with different exfoliation α-ZrP flakes was fabricated by the ultrasonic-assisted exfoliation and subsequent freeze-casting technique. An alternating-layered epoxy/α-ZrP composite was made by infiltrating epoxy resin into the aerogel scaffold. The layered epoxy/α-ZrP composite consists of 99 wt% epoxy, in contrast to the scaffold, which contains 1 wt% α-ZrP. It exhibits outstanding fracture toughness, 1.4 times that of neat epoxy, and demonstrates low dielectric constant due to the anisotropic α-ZrP aerogel scaffold, which can be used for antenna packaging. Further studies reveal the effect of exfoliation time on the dimensions and dispersion of α-ZrP flakes, as well as the mechanical properties of epoxy/α-ZrP composites. The crack propagation path and fracture morphology were observed by Optical Microscopy (OM) and Scanning Electron Microscopy (SEM), based on which the toughening mechanisms of epoxy/α-ZrP layered composites were discussed.

为了保护电子元件并确保其长期稳定性，天线封装通常采用环氧树脂（EP）复合材料，因为其机械强度高，介电常数低，易于成型，满足了设计要求，但其分子网络高度交联，导致断裂韧性差。本文采用超声辅助剥落和冷冻铸造技术制备了具有不同剥落α-ZrP薄片的层状气凝胶支架。将环氧树脂渗透到气凝胶支架中，制备了环氧树脂/α-ZrP交替层状复合材料。层状环氧树脂/α-ZrP复合材料含有99%的环氧树脂，而支架含有1%的α-ZrP。它具有优异的断裂韧性，是纯环氧树脂的1.4倍，并且由于α-ZrP气凝胶支架具有各向异性，因此具有较低的介电常数，可用于天线封装。进一步的研究揭示了剥落时间对α-ZrP薄片尺寸和分散性的影响，以及环氧树脂/α-ZrP复合材料的力学性能。通过光学显微镜（OM）和扫描电镜（SEM）观察了裂纹扩展路径和断口形貌，在此基础上探讨了环氧树脂/α-ZrP层状复合材料的增韧机理。

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引用次数: 0

Intrinsic properties and mechanical behaviors of a W-free single crystal CoNiCr-based multicomponent alloy 无w单晶conicr基多组分合金的本征性能和力学行为

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-09 DOI: 10.1016/j.jmrt.2025.12.103

Nan Zou , Qingqing Ding , Dingxin Zhou , Xiao Wei , Ze Zhang , Hongbin Bei

CoNi-based alloys are critical structural materials for aerospace and gas turbine applications due to their outstanding oxidation and corrosion resistance. However, their relatively low strength at high temperature limits broad applications. Therefore, γ′-strengthened CoNi-based alloys have attracted considerable interest, which requires a fundamental understanding of their intrinsic properties and mechanical behaviors. In this study, a single crystal (SX) CoNiCr-based alloy with the composition Co–30Ni–10Cr–9Al–5Mo–2Ta-0.03B (at.%) without W, which is generally required for γ′ stabilization in CoNi-based alloys, is successfully grown by using Bridgman method. After solution and aging treatments, the alloy exhibits a typical γ/γ′ two-phase microstructure with spherical γ′ precipitates (∼50 vol%, ∼110 nm in diameter) uniformly distributed in the γ matrix. Intrinsic properties, such as density, melting point, elastic constants, Debye temperature, etc., are determined. Furthermore, the mechanical properties and deformation behavior are examined with the aid of advanced microscopy. The strength of the W-free SX alloy is comparable to that of typical Co–Al–W SX alloys. In the temperature range from room temperature to 1000 °C, the SX CoNiCr-based alloy exhibits excellent ductility with the elongation to fracture consistently exceeding 33 %. The deformation mechanisms resemble those of Ni-based SX superalloys, which are dominated by dislocation pairs below 800 °C and single dislocations above 900 °C.

镍基合金因其出色的抗氧化和耐腐蚀性而成为航空航天和燃气轮机应用的关键结构材料。然而，它们在高温下相对较低的强度限制了它们的广泛应用。因此，γ′强化镍基合金引起了人们极大的兴趣，这需要对其内在性能和力学行为有基本的了解。本研究采用Bridgman方法成功生长出一种成分为Co-30Ni-10Cr-9Al-5Mo-2Ta-0.03B （at.%）的单晶（SX） conicr基合金，其成分为Co-30Ni-10Cr-9Al-5Mo-2Ta-0.03B （at.%）。经过固溶和时效处理，合金呈现出典型的γ/γ′两相组织，球状γ′相（约50 vol%，直径约110 nm）均匀分布在γ基体中。固有性质，如密度，熔点，弹性常数，德拜温度等，被确定。利用先进的显微技术对其力学性能和变形行为进行了研究。无w SX合金的强度与典型的Co-Al-W SX合金相当。在室温至1000℃的温度范围内，SX conicr基合金表现出优异的延展性，断裂伸长率始终超过33%。变形机制与镍基SX高温合金相似，在800℃以下以位错对为主，900℃以上以单位错为主。

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引用次数: 0

Enhancement of strength and ductility in 17-4 PH stainless steel fabricated by laser powder bed fusion via two-step aging heat treatment 激光粉末床熔合两步时效热处理提高17-4 PH不锈钢的强度和塑性

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-09 DOI: 10.1016/j.jmrt.2025.12.078

Rongrong Huang , Rui Ma , Hongyun Zhao , Yiming Sun , Yazhou Liu , Qi Chen , Danyang Lin , Bo Chen , Xiaoguo Song , Caiwang Tan

This study designed two-step aging treatments based on a conventional heat treatment process to simultaneously enhance the strength and ductility of 17-4 PH stainless steel (SS) fabricated by laser powder bed fusion (LPBF). The matrix consisted primarily of martensite, with a small amount of reverted austenite. The two-step aging treatment promoted martensite tempering and the further precipitation of Cu-rich particles. The contribution of precipitation strengthening was significantly enhanced owing to the increased volume fraction of Cu-rich precipitates, whereas the Orowan bypassing mechanism remained the dominant interaction mode. The newly formed fine Cu-rich precipitates in the DH450 samples were coherent with the matrix, which facilitated a partial transition to the dislocation-shearing mechanism. As the secondary aging temperature increased, the newly formed precipitates coarsened, leading to a decrease in tensile strength. The redistribution of austenite-stabilizing elements during the secondary aging process enhanced the reverted austenite content, facilitating strain-induced martensitic transformation, enhancing the work-hardening capability, and contributing to improved ductility. The optimum mechanical properties were obtained in DH450, with a yield strength of 876.06 MPa, an ultimate tensile strength of 1049.61 MPa, and an elongation of 19 %. Thus, this study achieved a synergistic improvement in strength and plasticity through a two-step aging process, providing a basis for the heat-treatment design of LPBF 17-4 PH SS.

本研究在传统热处理工艺的基础上设计了两步时效处理，以同时提高激光粉末床熔合（LPBF） 17-4 PH不锈钢（SS）的强度和塑性。基体以马氏体为主，有少量还原奥氏体。两步时效处理促进了马氏体回火和富cu颗粒的进一步析出。富cu析出相体积分数的增加显著增强了沉淀强化的贡献，Orowan旁路机制仍然是主要的相互作用模式。DH450样品中新形成的细小富cu析出相与基体相一致，促进了位错-剪切机制的部分过渡。随着二次时效温度的升高，新形成的析出物变粗，导致抗拉强度降低。在二次时效过程中，奥氏体稳定元素的重新分配增加了还原奥氏体含量，促进了应变诱导马氏体转变，提高了加工硬化能力，并有助于提高塑性。DH450的屈服强度为876.06 MPa，极限抗拉强度为1049.61 MPa，伸长率为19%，力学性能最佳。因此，本研究通过两步时效工艺实现了强度和塑性的协同提高，为LPBF 17-4 PH SS的热处理设计提供了依据。

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引用次数: 0

Material characterization of waste plastic pyrolysis char (WPPC) and its applicability evaluation in mortar 废塑料热解炭（WPPC）的材料表征及其在砂浆中的适用性评价

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-10 DOI: 10.1016/j.jmrt.2025.12.075

Hyeyoung Youn , Gyuyong Kim , Byungcheol Choi , Sungjun Ji , Younggiun Pyo , Jeongsoo Nam

Char generated from waste plastic pyrolysis processes is currently in the early stages of research and is often discarded due to a lack of potential uses. This study examined the fundamental properties of Waste plastic pyrolysis char (WPPC) as a building material from the perspectives of resource circulation and carbon reduction. Furthermore, the applicability of WPPC as a building material was evaluated using it as a fine aggregate replacement in mortar. WPPC is a carbonaceous heterogeneous mixture characterized by irregular, unstructured porosity and a particle size distribution similar to natural fine aggregate. Its high water absorption, low density, and chemical heterogeneity affected the flowability, air content, and setting time of the mortar. The observed decrease in mechanical performance suggests that WPPC cannot replace fine aggregate for general purposes. However, its functional properties, such as expansion, water absorption, and sound absorption, suggest its potential as a building material for specialized applications.

废塑料热解过程产生的炭目前处于研究的早期阶段，由于缺乏潜在的用途而经常被丢弃。本研究从资源循环和碳减排的角度研究了废塑料热解炭作为建筑材料的基本特性。此外，还评价了WPPC作为建筑材料的适用性，将其作为砂浆中的细骨料替代品。WPPC是一种碳质非均质混合物，孔隙度不规则、无结构，粒径分布与天然细骨料相似。它的高吸水率、低密度和化学非均质性影响了砂浆的流动性、空气含量和凝结时间。观察到的力学性能下降表明，在一般情况下，WPPC不能取代细骨料。然而，它的功能特性，如膨胀、吸水和吸声，表明它作为一种特殊应用的建筑材料的潜力。

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引用次数: 0

Corrigendum to “Structural, tribological and antibacterial properties of (α+β) based Ti-alloys for biomedical applications” [J Mater Res Technol. 2020; 9(6):14061–14074] “（α+β）基钛合金在生物医学应用中的结构、摩擦学和抗菌性能”[J] .材料工程学报。2020；9 (6): 14061 - 14074)

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-03 DOI: 10.1016/j.jmrt.2025.12.025

Mamoun Fellah , Naouel Hezil , Mohammed Zine Touhami , Mohammed Abdul Samad , Aleksei Obrosov , Dmitry O. Bokov , Ekaterina Marchenko , Alex Montagne , Alain IOST , Akram Alhussein

引用次数: 0

Phase stability and mechanical property of B2–Ni(Al,Fe) in a duplex Fe–Ni–Cr–Al alloy during aging at 375–475 °C 375 ~ 475℃时效过程中Fe - ni - cr - Al双相合金中B2-Ni （Al,Fe）的相稳定性和力学性能

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-10 DOI: 10.1016/j.jmrt.2025.12.090

Chaewon Kim , Sumin Kim , Changheui Jang

The phase stability of B2–Ni(Al,Fe) in a duplex Fe–Ni–Cr–Al alloy was investigated during long-term aging at 375–475 °C using transmission electron microscopy (TEM), nanoindentation, and thermodynamic calculations. Aging at 425 and 475 °C resulted in the formation of Fe-rich disordered bcc (A2) regions and L1₂-Ni₃Al precipitates within the B2 matrix. The A2/B2 decomposition proceeded via spinodal decomposition at 425 °C, whereas a nucleation-and-growth mechanism dominated at 475 °C. In contrast, the L1₂ precipitates exhibited diffusion-controlled growth and coarsening under all aging conditions. Nanoindentation revealed continuous hardening at 375 °C, and typical aging-hardening followed by softening at 425 and 475 °C. Integrating the microstructural and mechanical results showed that L1₂-Ni₃Al precipitates are the primary strengthening mechanism of B2–Ni(Al,Fe) during long-term aging in this temperature range.

采用透射电镜（TEM）、纳米压痕和热力学计算等方法研究了双相Fe - ni - cr - Al合金中B2-Ni （Al,Fe）在375 ~ 475℃长期时效过程中的相稳定性。425℃和475℃时效后，在B2基体内形成了富铁无序bcc （A2）区和L12-Ni3Al相。425℃时，A2/B2的分解主要通过独立分解进行；475℃时，A2/B2的分解主要通过成核和生长机制进行。相反，L12相在所有时效条件下均表现为扩散控制生长和粗化。纳米压痕在375℃时表现为连续硬化，在425℃和475℃时表现为典型的时效硬化后软化。综合组织和力学结果表明，L12-Ni3Al析出是B2-Ni （Al,Fe）在该温度范围内长期时效的主要强化机制。

引用次数: 0

Investigation on the magnetic abrasive finishing performance and plastic deformation mechanism of copper 铜磁磨料抛光性能及塑性变形机理研究

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-01 DOI: 10.1016/j.jmrt.2025.11.248

Jinzhong Wu , Zhangyu Wu , Liang Luo , Fengjun Chen , Pengfei Wang , Pengfei Gao , Longfeng Cui

This study experimentally investigates the finishing performance of the magnetic abrasive finishing (MAF) method driven by a varying magnetic field on single-crystal copper, and elucidates the plastic deformation mechanism of copper during nano-finishing using molecular dynamics simulations. First, the effects of grinding fluid, magnetic pole rotational speed, and current frequency on the surface roughness and material removal amount of copper were examined via comparative experiments. Using a varying magnetic field for two-stage finishing, the final surface roughness of copper reached 6.5 nm. Molecular dynamics simulations were further employed to analyze the plastic deformation mechanism of copper during ultra-precision finishing. The simulation results reveal that the plastic deformation of copper arises from the flow of amorphous and HCP phases, accompanied by near-atomic-scale defects such as stacking faults, dislocations, and severe lattice distortions. This study clarifies the crystal deformation and damage mechanisms of copper during ultra-precision finishing, providing valuable insight for achieving high-efficiency, high-accuracy manufacturing of copper components.

本研究通过实验研究了不同磁场驱动下磁磨料抛光（MAF）方法对单晶铜的抛光性能，并通过分子动力学模拟阐明了铜在纳米抛光过程中的塑性变形机理。首先，通过对比实验考察了磨削液、磁极转速和电流频率对铜表面粗糙度和材料去除率的影响。在不同磁场条件下进行两段精加工，铜的表面粗糙度达到6.5 nm。采用分子动力学模拟方法分析了铜在超精密加工过程中的塑性变形机理。模拟结果表明，铜的塑性变形是由非晶相和HCP相的流动引起的，并伴随着近原子尺度的缺陷，如层错、位错和严重的晶格畸变。本研究阐明了铜在超精密加工过程中的晶体变形和损伤机理，为实现铜部件的高效率、高精度制造提供了有价值的见解。

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引用次数: 0

Microstructure and anisotropy of mechanical properties in 7055 aluminum alloy fabricated by additive friction stir deposition: effects of heat treatment 添加剂搅拌摩擦沉积7055铝合金的显微组织和力学性能的各向异性：热处理的影响

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-01 DOI: 10.1016/j.jmrt.2025.11.253

Honglei Liu , Lei Chen , Gaohong Chen , Jinyu Fu , Wenzhu Shao , Kai Han

Additive friction stir deposition (AFSD) technology provides a solution by enabling near-net-shape part production, imparting forging-like qualities with minimal machining requirements, thereby emerging as a rapidly evolving manufacturing method. This study thoroughly investigated the micro-structural evolution, mechanical properties, and strength anisotropy of large 7055 aluminum alloy specimens fabricated by the AFSD technology. The concrete results revealed that the as-deposited material indicated a fine grain structure (approximately 3 μm), with residual Zn/Cu-rich precipitates, resulting in low yield strength anisotropy, but poor ductility in the structural (ST) direction due to porosity defects. Solution heat treatment (SHT) dissolved these precipitates, achieving solid solution strengthening with a 116.1 % increase in micro-hardness (reaching 220.4 HV_0.2). Subsequent aging treatment (120 °C/6 h + 160 °C/6 h) resulted in the formation of nanoscale GP zones and η′ precipitates, leading to ultimate tensile strengths of 500.9 MPa and 493.0 MPa in the L and LT directions, respectively, with increases of 68.7 % and 61.4 %. Nevertheless, grain boundary precipitation and pre-existing voids lead to reduce ductility and brittle fracture in the ST direction. Ultimately, the paper demonstrates that post-deposition heat treatment can effectively restore the strength potential of AFSD 7055.

添加剂搅拌摩擦沉积（AFSD）技术提供了一种解决方案，通过实现近净形状零件的生产，以最小的加工要求赋予锻造样质量，从而成为一种快速发展的制造方法。研究了采用AFSD技术制备的7055铝合金大型试样的微观组织演变、力学性能和强度各向异性。结果表明：沉积态材料呈细晶粒结构（约为3 μm），并伴有富集Zn/ cu的析出相残留，屈服强度各向异性较低，但由于气孔缺陷导致结构（ST）方向延展性较差；固溶热处理（SHT）溶解这些析出相，实现固溶强化，显微硬度提高116.1%（达到220.4 HV0.2）。随后的时效处理（120°C/6 h + 160°C/6 h）导致纳米级GP区和η′析出，L和LT方向的极限抗拉强度分别达到500.9 MPa和493.0 MPa，分别提高了67.7%和61.4%。然而，晶界沉淀和先前存在的空洞导致ST方向的延性降低和脆性断裂。最后，本文论证了沉积后热处理可以有效地恢复AFSD 7055的强度潜力。

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引用次数: 0

Grains growing by simultaneous recrystallization and grain growth mechanisms near the surface of shot peened Al 喷丸强化铝表面同步再结晶晶粒长大及晶粒长大机制

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-03 DOI: 10.1016/j.jmrt.2025.11.258

P. Snopiński , K. Matus , X. Zhang , T. Yu , D. Juul Jensen

Surface treatments like shot peening (SP) are frequently applied to laser powder bed fusion (LPBF) alloys to introduce beneficial compressive residual stresses, but this process simultaneously creates a gradient microstructure near the surface. The thermal stability of this SP-induced microstructure is critical, as any microstructural evolution during in-service thermal exposure could compromise the beneficial properties. This study analyzes the microstructural evolution of SP-treated LPBF AlSi10Mg during annealing at 500 °C using scanning electron microscopy and electron backscatter diffraction. It is found that the as-built Si network is fragmented by SP and a microstructural gradient is induced: The grains are ultrafine (0.8 μm) at the surface and transition towards coarser sizes reaching 3.0 μm at a depth of 40 μm. Consequently, the annealing response is heterogeneous: The surface layer undergoes rapid coarsening (the high-angle boundary spacing increases from 0.8 μm to 3.4 μm in 5 min), while at the subsurface a few nuclei grow rapidly to an abnormally large size. Subsequently, these grains grow to dominate both the surface and the layer below, facilitated by a reduction in Zener pinning as the Si particles coarsen. This study provides critical insight into a series of competing microstructural mechanisms, which are essential for predicting performance evolution when an SP treated LPBF AlSi10Mg component is in use.

像喷丸强化（SP）这样的表面处理经常应用于激光粉末床熔合（LPBF）合金，以引入有益的压残余应力，但该过程同时在表面附近产生梯度微观结构。这种sp诱导微观结构的热稳定性至关重要，因为在使用过程中，任何微观结构的演变都可能损害有益的性能。本研究利用扫描电镜和电子背散射衍射分析了sp处理的LPBF AlSi10Mg在500℃退火过程中的组织演变。结果表明：Si网络在SP作用下破碎，并产生了微观结构梯度：表面晶粒为超细（0.8 μm），在深度为40 μm处晶粒向粗晶粒过渡，达到3.0 μm；因此，退火响应是不均匀的：表层迅速粗化（高角边界间距在5分钟内从0.8 μm增加到3.4 μm），而在亚表面，少数核迅速生长到异常大的尺寸。随后，随着Si颗粒变粗，齐纳钉钉的减少促进了这些晶粒的生长，并在表面和下面的层中占据主导地位。该研究提供了一系列相互竞争的微观结构机制的关键见解，这些机制对于预测SP处理的LPBF AlSi10Mg组件在使用时的性能演变至关重要。

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引用次数: 0

Achieving large plasticity in bulk magnesium single crystal via dynamic compression 通过动态压缩实现大块镁单晶的大塑性

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-01 DOI: 10.1016/j.jmrt.2025.11.259

Huanhuan Chen , Zhen Zhang , Shilai Hu , Jinhua Peng , Xiaodong Du

Compression tests were performed on magnesium (Mg) single crystals along the c-axis at ambient temperature. The plastic behaviors under quasi-static and dynamic conditions were comparatively analyzed. Twinning dominated quasi-static compression, in which stress concentration at twin boundaries initiated the formation of cracks and voids, ultimately leading to premature failure. In contrast, dynamic compression triggered “deformation graining”, which effectively suppressed twin nucleation and accommodated substantial plastic deformation. Additionally, the new grains generated by deformation graining continuously activated the basal slip to contribute to partial plasticity.

对镁单晶在常温下沿c轴进行了压缩实验。比较分析了准静态和动态条件下的塑性行为。准静态压缩以孪晶为主，孪晶边界处的应力集中引发裂纹和空洞的形成，最终导致材料过早破坏。动态压缩引发“变形晶化”，有效抑制孪核，容纳大量塑性变形。此外，变形粒化产生的新晶粒不断激活基底滑移，有助于局部塑性。

引用次数: 0

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