Journal of Manufacturing Processes最新文献_第5页

Interpretable contour encoding network customized for acoustic emission adaptive cepstrum in laser shock peening monitoring 为激光冲击强化监测中的声发射自适应倒频谱定制的可解释轮廓编码网络

IF 6.1 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Journal of Manufacturing Processes

Pub Date : 2024-11-04 DOI: 10.1016/j.jmapro.2024.10.041

Rui Qin , Zhifen Zhang , Jing Huang , Zhengyao Du , Shuai Zhang , Quanning Xu , Yu Su , Guangrui Wen , Weifeng He , Xuefeng Chen

Combining acoustic emission techniques and deep learning models for online quality monitoring of laser shock peening has the application value of real-time, high-accuracy, and adaptability. However, general models may have poor generalization ability and feature interpretability in acoustic emission (high peak, fast attenuation, and long plateau) monitoring tasks. To address this issue, this paper customizes an interpretable model called the contour encoding network tailored to the adaptive cepstrum characteristics of acoustic emission. Specifically, we first analyze the information propagation manner of the acoustic emission adaptive cepstrum within the general model. The paper focuses on extracting valuable discriminative information from the edge contour features of the adaptive cepstrum using learnable high-pass filtering operators. Furthermore, to make the model pay more attention to specific sensitive regions of the input data, this paper proposes a customized attention module. It is non-parameterized, thus having an interpretable computational process. This proposed network architecture can maximize recognition performance, simplify model structure, and improve generalization ability. The effectiveness and reliability of the proposed method are validated on experimental data of laser shock peening. The experimental results demonstrate that the proposed method achieves superior recognition accuracy compared to other advanced networks and exhibits desirable interpretability.

将声学发射技术与深度学习模型相结合，用于激光冲击强化的在线质量监测，具有实时、高精度和适应性强等应用价值。然而，在声发射（峰值高、衰减快、高原期长）监测任务中，通用模型的泛化能力和特征可解释性可能较差。为解决这一问题，本文针对声发射的自适应倒频谱特征，定制了一种称为轮廓编码网络的可解释模型。具体来说，我们首先分析了声发射自适应倒频谱在一般模型中的信息传播方式。本文的重点是利用可学习的高通滤波算子从自适应倒频谱的边缘轮廓特征中提取有价值的判别信息。此外，为了让模型更加关注输入数据中的特定敏感区域，本文提出了一个定制的关注模块。该模块是非参数化的，因此具有可解释的计算过程。本文提出的网络结构可以最大限度地提高识别性能，简化模型结构，提高泛化能力。通过激光冲击强化的实验数据验证了所提方法的有效性和可靠性。实验结果表明，与其他先进的网络相比，所提出的方法实现了更高的识别精度，并表现出理想的可解释性。

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引用次数: 0

Exploring the impact of cutter surface texture on the enhancement of elastomer cutting performance 探索刀具表面纹理对提高弹性体切割性能的影响

IF 6.1 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Journal of Manufacturing Processes

Pub Date : 2024-11-03 DOI: 10.1016/j.jmapro.2024.10.030

Shuhuan Zhang, Rui Yang, Rui Liu

The cutting technique is widely utilized for shaping elastomeric products in industries such as automotive, medical, and wearables, due to its adaptability and effectiveness. Nevertheless, the challenges of high cutting resistance and substantial material deformation impede its application for precision cuts. Prior studies have identified the significant role of friction between the elastomer and cutter in this resistance, yet a thorough investigation of this friction and its mitigation remains unaddressed. This research delves into the frictional dynamics at the cutting interface and introduces an innovative surface texturing method to reduce this friction. Using a ring-on-disc tribometer, the study examined the friction between the elastomer and various rigid surfaces with different roughness levels. Building on these insights, a sandblasting technique was adopted to create an optimized surface texture, resulting in enhanced cutting performance. Experimental results showed that adding surface texture to blades and needles reduced friction by 60 % and 20 %, respectively, compared to non-textured tools. This was further validated through orthogonal blade cutting and needle penetration experiments.

这种切割技术因其适应性和有效性，被广泛应用于汽车、医疗和可穿戴设备等行业的弹性产品成型。然而，高切割阻力和材料大幅变形的挑战阻碍了其在精密切割中的应用。先前的研究已经发现弹性体和切割器之间的摩擦在这种阻力中起着重要作用，但对这种摩擦及其缓解的深入研究仍未得到解决。这项研究深入探讨了切割界面的摩擦动力学，并引入了一种创新的表面纹理加工方法来减少这种摩擦。研究使用盘上环形摩擦仪，检测了弹性体与不同粗糙度的各种刚性表面之间的摩擦。在此基础上，研究人员采用喷砂技术制作出优化的表面纹理，从而提高了切削性能。实验结果表明，与没有纹理的工具相比，在刀片和针上添加表面纹理可分别减少 60% 和 20% 的摩擦力。正交刀片切割和针刺实验进一步验证了这一点。

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引用次数: 0

Mechanical analysis of SUS316L, tool steel, Ti, and AlSi10Mg lattice structures manufactured by laser-powder bed fusion for energy absorption design 用于能量吸收设计的激光粉末熔床制造的 SUS316L、工具钢、钛和 AlSi10Mg 晶格结构的力学分析

IF 6.1 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Journal of Manufacturing Processes

Pub Date : 2024-11-02 DOI: 10.1016/j.jmapro.2024.10.062

Van Loi Tran , Shengwei Zhang , Jin-Cheol Kim , Sung-Tae Hong , Ulanbek Auyeskhan , Jihwan Choi , Jeong Hun Lee , Chung-Soo Kim , Dong-Hyun Kim

This study experimentally investigates the dependence of mechanical properties of an additively manufactured (AMed) FCCXYZ lattice structure on base materials of stainless steel 316 L, tool steel 1.2709, titanium alloy (Ti-Gr.2), and aluminum alloy (AlSi10Mg). Lattice structures with relative density (RD) from 0.11 to 0.36 show different compressive failure modes depending on the RD. A layer-by-layer collapse mode is observed at low RD, whereas a bulk failure mode is observed at high RD. A Gibson-Ashby model is developed to accurately forecast the performance of FCCXYZ lattice structures at different RDs. The discoveries presented in this study will be a valuable reference for designing an energy-absorbing component in metal AM.

本研究通过实验研究了以不锈钢 316 L、工具钢 1.2709、钛合金（Ti-Gr.2）和铝合金（AlSi10Mg）为基础材料的添加制造（AMed）FCCXYZ 晶格结构的机械性能。相对密度（RD）从 0.11 到 0.36 的晶格结构根据 RD 的不同显示出不同的压缩破坏模式。在低相对密度时，可观察到逐层坍塌模式，而在高相对密度时，则可观察到块体破坏模式。我们建立了一个 Gibson-Ashby 模型，以准确预测 FCCXYZ 晶格结构在不同 RD 下的性能。本研究中的发现将为设计金属 AM 中的能量吸收部件提供宝贵的参考。

引用次数: 0

Formation mechanism of layered Ti(C, N) during bidirectional freeze casting and its effect on the mechanical properties of nacre-inspired Ti(C, N)/AZ91 composites 双向冷冻铸造过程中层状 Ti（C，N）的形成机理及其对珍珠岩启发的 Ti（C，N）/AZ91 复合材料机械性能的影响

IF 6.1 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Journal of Manufacturing Processes

Pub Date : 2024-11-02 DOI: 10.1016/j.jmapro.2024.10.073

Meng Nie , Bo Lin , Yali Chen , Huaqiang Xiao

A large-sized Ti(C, N) skeleton is prepared using an environmentally friendly and low-energy bidirectional freeze casting technology. In the horizontal direction, the ice crystals grow stably since the nucleation temperature line is always located at the front end of the ice crystals; thus, a long-range ordered layered morphology is formed on the cross section. Due to the extremely low temperature gradient in the vertical direction, the nucleation temperature line exceeds the front end of the ice crystal growth, resulting in the simultaneous nucleation and growth of multiple ice crystals and the formation of a dendritic lamellar morphology on the longitudinal section. In addition, due to the increase of undercooling and the settlement of ceramic particles, the ceramic content increases gradually from the upper to the lower part of the ceramic skeleton, while the layer thickness and pore width decrease accordingly. Subsequently, AZ91 is filled into the Ti(C, N) skeleton via gas pressure infiltration to obtain Ti(C, N)/AZ91 layered composites. Due to the strong support provided by the bottom-up continuous ceramic layer, the lower part of the composites has the highest compressive strength (395 MPa), while their middle part exhibits the best fracture initiation toughness (14.2 MPa·m^1/2), crack propagation toughness (32.6 MPa·m^1/2), and bending strength (421 MPa). The high strength and toughness in the middle portion of the composites can be attributed to the fewer defects in the ceramic layer, the plastic deformation of the metal layer, and a variety of external toughening mechanisms. Due to the combined effect of various non-inherent toughening mechanisms, the R curve of the composites presents an upward behavior, i.e., the fracture resistance is improved during the fracture process.

利用环保、低能耗的双向冷冻铸造技术制备了大尺寸钛（C，N）骨架。在水平方向上，由于成核温度线始终位于冰晶的前端，冰晶生长稳定，因此在横截面上形成了长程有序层状形态。由于垂直方向的温度梯度极低，成核温度线超过了冰晶生长的前端，导致多个冰晶同时成核和生长，并在纵截面上形成树枝状的层状形态。此外，由于过冷度的增加和陶瓷颗粒的沉降，陶瓷含量从陶瓷骨架的上部到下部逐渐增加，而层厚和孔宽则相应减小。随后，通过气压渗透将 AZ91 填充到 Ti（C，N）骨架中，得到 Ti（C，N）/AZ91 层状复合材料。由于自下而上的连续陶瓷层提供了强有力的支撑，复合材料的下部具有最高的抗压强度（395 兆帕），而中间部分则表现出最佳的断裂起始韧性（14.2 兆帕-m1/2）、裂纹扩展韧性（32.6 兆帕-m1/2）和弯曲强度（421 兆帕）。复合材料中间部分的高强度和高韧性可归因于陶瓷层中较少的缺陷、金属层的塑性变形以及各种外部增韧机制。在各种非固有增韧机制的共同作用下，复合材料的 R 曲线呈上升趋势，即在断裂过程中提高了抗断裂强度。

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引用次数: 0

Large-area broadband ultralow reflectance biomimetic structures silicon via femtosecond laser inducing and chemical etching 通过飞秒激光诱导和化学蚀刻实现大面积宽带超低反射率仿生结构硅

IF 6.1 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Journal of Manufacturing Processes

Pub Date : 2024-11-02 DOI: 10.1016/j.jmapro.2024.10.079

Kun Zhou, Yanping Yuan, Chunlian Wang, Jimin Chen

The low efficiency of femtosecond laser processing and the ordinary antireflection performance are still huge obstacles that dramatically inhibit the practical application of femtosecond laser antireflection technology. Inspired from the moth eye, this paper aims to propose a novel and highly efficient method to fabricate the broadband ultralow reflectance biomimetic structures silicon via femtosecond laser inducing and chemical etching. Different from the traditional micro size focus spot of femtosecond laser, a beam shaping strategy is used to generate centimeter scale line beam to fabricate hierarchical structures on silicon surface, which dramatically increases the manufacturing efficiency. Then, based on the structural differences induced by line beam, a screen block strategy and a chemical etching method are involved to selectively fabricate antireflective biomimetic micro pillars in a large area. Accordingly, the reflectance of biomimetic structures is lower than 0.2 % in the wavelength of 300 nm–2500 nm, and the omnidirectional reflectance is lower than 0.6 % and 1.4 % for S polarization and P polarization light at different incident angles (20°–80°), respectively. Additionally, it only takes <35 min to fabricate biomimetic structures of 24.8 × 24.8 mm² on Si surface with such outstanding antireflection performance, which is highly efficient.

飞秒激光加工效率低、抗反射性能一般等问题仍是制约飞秒激光抗反射技术实际应用的巨大障碍。受飞蛾眼睛的启发，本文旨在提出一种新颖高效的方法，通过飞秒激光诱导和化学刻蚀来制造宽带超低反射率仿生结构硅。与传统飞秒激光的微米级聚焦光斑不同，该方法采用光束整形策略，产生厘米级线束，在硅表面制备分层结构，极大地提高了制造效率。然后，根据线束诱导的结构差异，采用丝网块策略和化学蚀刻方法，大面积选择性地制造抗反射仿生微柱。因此，在 300 nm-2500 nm 波长范围内，仿生结构的反射率低于 0.2%；在不同入射角（20°-80°）下，S 偏振光和 P 偏振光的全向反射率分别低于 0.6% 和 1.4%。此外，只需 35 分钟就能在硅表面制作出 24.8 × 24.8 平方毫米的生物仿生结构，具有如此出色的抗反射性能，可谓高效。

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引用次数: 0

A novel trajectory planning method for mobile robotic grinding wind turbine blade 移动机器人打磨风力涡轮机叶片的新型轨迹规划方法

IF 6.1 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Journal of Manufacturing Processes

Pub Date : 2024-11-02 DOI: 10.1016/j.jmapro.2024.10.046

Yi Hua, Xuewu Wang, Ye Wang, Sanyan Chen, Zongjie Lin

As the core component of wind turbine, wind turbine blade requires two grinding processes in the production. However, mobile robotic automation grinding of wind turbine blades is considered to be a challenging task due to the high aspect ratio and compound surface of the wind turbine blade. The trajectories generated by most robotic grinding trajectory planning algorithms are often found to be inferior in grinding large compound surface workpieces, as they are typically designed for robotic machining with a fixed base. In this paper, a novel iso-planar algorithm based on oriented bounding box (OBB) of the workpiece is developed to plan the grinding trajectories by taking into consideration the characteristics of blade. The constant chord length algorithm employing Taylor quadratic expansion is then developed to discretize trajectory into grinding points. Considering the characteristics of compound surface, a post-processing strategy is proposed to eliminate redundant grinding points and generate consistent tool orientations on compound surface. Based on these three steps, a workstation location optimization model for improving robot manipulability is introduced to determine a series of workstation locations. Furthermore, the grinding and movement synchronization strategy based on mobile platform trajectory interpolation is proposed to enhance the efficiency of machining large workpieces. The simulation and experiments demonstrate the effectiveness of the proposed trajectory planning method for mobile robotic grinding wind turbine blade, the rationality of the optimization model and the feasibility of grinding and movement synchronization strategy.

作为风力涡轮机的核心部件，风力涡轮机叶片在生产过程中需要经过两道打磨工序。然而，由于风力涡轮机叶片的高纵横比和复合表面，移动机器人自动化打磨风力涡轮机叶片被认为是一项具有挑战性的任务。大多数机器人打磨轨迹规划算法所生成的轨迹通常在打磨大型复合表面工件时效果不佳，因为这些算法通常是为固定基座的机器人加工而设计的。本文开发了一种基于工件定向边界框（OBB）的新型等平面算法，在考虑叶片特性的基础上规划磨削轨迹。然后，利用泰勒二次展开的恒弦长算法将轨迹离散为磨削点。考虑到复合表面的特性，提出了一种后处理策略，以消除多余的磨削点，并在复合表面上生成一致的刀具方向。在这三个步骤的基础上，引入了工作站位置优化模型，以确定一系列工作站位置，从而提高机器人的可操作性。此外，还提出了基于移动平台轨迹插值的打磨和移动同步策略，以提高大型工件的加工效率。仿真和实验证明了所提出的移动机器人打磨风力涡轮机叶片的轨迹规划方法的有效性、优化模型的合理性以及打磨和运动同步策略的可行性。

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引用次数: 0

Nano gradient structuring at Ti-6Al-4V surface induced by ultrashort-pulse laser peening 超短脉冲激光强化诱导 Ti-6Al-4V 表面纳米梯度结构化

IF 6.1 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Journal of Manufacturing Processes

Pub Date : 2024-11-01 DOI: 10.1016/j.jmapro.2024.10.083

Pengjie Wang , Haimin Ding , Qing Peng

We have successfully fabricated gradient micro/nano structuring on the surface top layers of Ti-6Al-4V alloy using a shock-peening technique facilitated by femtosecond and picosecond laser pulses, without the need for coatings or confinement. These micro/nano structures encompass ultrafine grains, extensive subgrain boundaries, hierarchical nanotwins, and complex dislocation morphologies. The ultrafine grains, ranging in size from hundreds of nanometers to a few micrometers, were predominantly located in the grain-refined regions, whereas the micro/nano dislocation structures were predominantly found in regions of severe plastic deformation. These observations suggest a promising avenue for achieving high-precision gradient structuring in the field of metallic surface engineering.

我们利用飞秒和皮秒激光脉冲促进的冲击-剥离技术，成功地在 Ti-6Al-4V 合金的表面顶层制造出梯度微/纳米结构，而无需涂层或约束。这些微/纳米结构包括超细晶粒、广泛的亚晶界、分层纳米网和复杂的位错形态。超细晶粒的大小从数百纳米到几微米不等，主要位于晶粒细化区域，而微/纳米位错结构主要存在于严重塑性变形区域。这些观察结果表明，在金属表面工程领域实现高精度梯度结构很有前景。

引用次数: 0

Viscoplastic deformation behavior of S32760 duplex stainless steel during the cutting process S32760 双相不锈钢在切割过程中的粘塑性变形行为

IF 6.1 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Journal of Manufacturing Processes

Pub Date : 2024-10-31 DOI: 10.1016/j.jmapro.2024.10.069

Lin Yang , Fukang Gong , Minli Zheng , Xiangyuan Zhang , Jianqiu Xia , Xingyu Liu

Duplex stainless steel (DSS) is composed of the ferrite phase and austenite phase. The mechanical properties of these two-phases differ, and the mechanical behavior during cutting process is complex. Based on Oxley cutting theory, dislocation theory, and nonlinear dynamics theory, combined with experimental and simulation analysis, the manuscript studies the viscoplastic deformation behavior of S32760 DSS during the cutting process. Considering the two-phase viscous characteristics under high strain rate conditions, a viscoplastic constitutive model of S32760 DSS was established. The influence of strain rate change in the shear zone on the chip morphology and the effects of strain, strain rate, and temperature on the microhardness of the two-phases were analyzed. The strain rate strengthening effect of viscoplastic deformation of cutting S32760 DSS was elucidated. The impact of strain, strain rate, and temperature on the dynamic recrystallization of the surface layer material was analyzed, and the microstructure change rule of the machined surface was obtained. The viscoplastic deformation behavior of S32760 DSS was elucidated, taking into account the morphology of the chips, the microhardness, and the microstructural changes.

双相不锈钢（DSS）由铁素体相和奥氏体相组成。这两相的力学性能不同，在切削过程中的力学行为也很复杂。本文以 Oxley 切削理论、位错理论和非线性动力学理论为基础，结合实验和模拟分析，研究了 S32760 DSS 在切削过程中的粘塑性变形行为。考虑到高应变速率条件下的两相粘滞特性，建立了 S32760 DSS 的粘塑构成模型。分析了剪切区应变率变化对切屑形态的影响，以及应变、应变率和温度对两相显微硬度的影响。阐明了切削 S32760 DSS 粘塑变形的应变率强化效应。分析了应变、应变率和温度对表层材料动态再结晶的影响，得出了加工表面的微观结构变化规律。结合切屑形态、显微硬度和显微结构变化，阐明了 S32760 DSS 的粘塑性变形行为。

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引用次数: 0

Simultaneously enhanced printing efficiency and conductivity of carbon black-reinforced PA1212 composites with network microstructures fabricated by selective fiber laser sintering 利用选择性光纤激光烧结技术同时提高具有网络微结构的碳黑增强 PA1212 复合材料的印刷效率和导电性能

IF 6.1 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Journal of Manufacturing Processes

Pub Date : 2024-10-31 DOI: 10.1016/j.jmapro.2024.10.015

Jiebin Wen , Luxin Liang , Yunhao Yue , Ting Lei , Li Chen , Tang Liu , Weihong Zhu , Xiaoshu Xu , Hong Wu

Due to its flexibility, ease of handling, and cost-effectiveness, long-chain polyamide powder (PA12/PA11/PA1212) fabricated by additive manufacturing is widely utilized in various industries. However, there is a need for further improvement in the mechanical strength and conductivity of long-chain polyamide powder prepared by SLS. In this study, we employed the selective laser sintering technique (SLS) equipped with a fiber laser to process carbon black (CB)-reinforced PA1212 powder composites. Our results indicate that CB plays a crucial role in enhancing the absorption rate of laser energy. CB significantly enhances absorption efficiency at 1080 nm in PA1212-C composites, with a 0.4 wt% CB content achieving optimal conversion efficiency. The mechanical properties of sintered polyamide components were significantly enhanced when sintered at a power of 120 W using high-speed printing techniques, with SLS utilizing fiber laser technology proving to be one-third more efficient than traditional SLS methods. When the CB content reached 1.6 wt%, the conductivity of the CB-based polymer composite parts achieved a value of 2.1 × 10⁻⁵ S/cm, indicating percolation behavior. This study demonstrates the feasibility of preparing CB-based polymer composites using fiber lasers through selective laser sintering technique, thereby expanding their potential application scope.

由于长链聚酰胺粉末（PA12/PA11/PA1212）具有柔韧性、易操作性和成本效益高的特点，利用增材制造技术制备的长链聚酰胺粉末被广泛应用于各行各业。然而，通过 SLS 制备的长链聚酰胺粉末的机械强度和导电性有待进一步提高。在这项研究中，我们采用了配备光纤激光器的选择性激光烧结技术（SLS）来加工炭黑（CB）增强 PA1212 粉末复合材料。研究结果表明，炭黑在提高激光能量吸收率方面起着至关重要的作用。炭黑能明显提高 PA1212-C 复合材料在 1080 nm 波长处的吸收效率，0.4 wt% 的炭黑含量能达到最佳转换效率。利用高速印刷技术在 120 W 功率下烧结聚酰胺部件时，其机械性能得到了显著提高，利用光纤激光技术进行 SLS 的效率比传统 SLS 方法高出三分之一。当 CB 含量达到 1.6 wt% 时，CB 基聚合物复合材料部件的电导率达到了 2.1 × 10-5 S/cm，显示了渗流行为。这项研究证明了利用光纤激光器通过选择性激光烧结技术制备基于 CB 的聚合物复合材料的可行性，从而扩大了其潜在的应用范围。

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引用次数: 0

Optimizing machinability and minimizing dislocation slip in hexagonal silicon carbide: The role of off-axis angle and processing surface type 优化六方碳化硅的可加工性并尽量减少位错滑移：离轴角度和加工表面类型的作用

IF 6.1 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Journal of Manufacturing Processes

Pub Date : 2024-10-31 DOI: 10.1016/j.jmapro.2024.10.055

Jianwei Ji , Cheng Fan , Binbin Meng

This work investigates the effects of processing direction/plane and off-axis angle on the removal process of monocrystal SiC and presents new findings. The processing direction/plane and off-axis angle has a direct bearing on material removal amount, abrasive wear amount, and subsurface damage layer depth. Material removal amount can be increased by up to four times just by optimizing the processing direction. It was discovered that, different from previous studies, the use of triangular pyramid abrasives as the processing tool results in substantially higher machinability for the Si face compared to the C face, particularly when the off-axis angle is selected as 0°. In addition, the temperature and stress components during the processing process are thoroughly analyzed in this paper. According to the analysis, the Burgers vector b = 1/3 < 11

\bar{2}

0 > occurring in the shuffle set is dominated by basal slip and is not affected by off-axis angle and crystal face type, but the dislocation depth caused by basal slip is closely related to the processing direction. As a semiconductor substrate material for epitaxial growth, damage including dislocations in the processed surface/subsurface area is not allowed. The influence mechanism of subsurface damage under the coupling effect of processing direction, off-axis angle and crystal face type is presented in this study.

本文研究了加工方向/平面和偏轴角度对单晶碳化硅去除过程的影响，并提出了新的发现。加工方向/平面和偏轴角度对材料去除量、磨料磨损量和表面下损伤层深度有直接影响。仅通过优化加工方向，材料去除量就可提高四倍。研究发现，与以往的研究不同，使用三角形金字塔磨料作为加工工具，Si 面的可加工性大大高于 C 面，尤其是当偏离轴线的角度选择为 0°时。此外，本文还对加工过程中的温度和应力成分进行了深入分析。分析结果表明，在洗牌组中出现的布尔格斯矢量 b = 1/3 < 112¯0 >以基底滑移为主，不受偏轴角度和晶面类型的影响，但基底滑移引起的位错深度与加工方向密切相关。作为用于外延生长的半导体衬底材料，加工表面/次表面区域不允许出现包括位错在内的损伤。本研究介绍了在加工方向、偏轴角和晶面类型耦合效应下次表面损伤的影响机制。

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引用次数: 0