Results 41 to 50 of about 183,314 (146)
Gaoya dianqi, 2015 某型号高压开关用铸态拐臂在试验过程中发生断裂,通过宏观检验、化学分析、金相检验、扫描电镜与能谱分析等方法对铸态拐臂断裂的原因进行了分析。结果表明:非金属夹杂是裂纹源萌生的地方,随后裂纹不断扩展,最终导致球墨铸铁拐臂断裂失效。拐臂的断裂机制为解理+沿晶界的混合型断裂,连续分布的皮下气孔也是促使拐臂断裂的原因。
王建伟, 何佳, 赵涛, 邹新峰
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Lignin hydrogenolysis is a promising route to separable aromatic monomers, yet practical upgrading is still hindered by macromolecular mass‐transfer limitations and the aggregation/deactivation of metal sites. Herein, we propose a “dual‐confinement” strategy to construct ultrafine Ru nanoclusters supported on lignin‐based N‐doped hierarchical ...
Tianjin Li +11 more
wiley +1 more source
Dizhen xuebao川滇地块是世界上构造活动与地震活动最活跃的地区之一，区内强震多集中于地块边界断裂上，而地块内部断裂的活动性及发震潜力尚未得到足够的关注。在川滇地块内部凉山州地区进行断层普查时发现一条明显的岩性分界线，将其命名为踩马水断裂。该断裂为川滇地块内部的一条NE向断裂，全长约80 km，目前其最新活动时代、运动性质、地震危险性和区域构造作用等研究仍处于空白状态。本研究综合运用遥感解译、野外调查、无人机测绘、探槽开挖和第四纪测年等多种方法，对踩马水断裂进行系统性的研究，明确了其几何展布特征 ...
Xin Tan +3 more
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Dizhen xuebao, 2019 通过建立三维数值模型，对隐伏正断层在均匀错动和倾斜错动方式下土体的破裂过程进行研究。利用应力罗德参数和等效塑性应变分别对断层错动过程中上覆土体的应力状态和破坏形式进行分析，并提出土体破裂的判别方法。通过对数值模拟结果的分析得到以下结论：① 在断层错动过程中，下盘一侧受断层错动影响的上覆土体的应力状态经压剪→纯剪→拉剪逐渐变化，而上盘一侧上覆土体的应力状态变化较为复杂，经压剪→纯剪→拉剪→纯剪→压剪重复变化；② 在断层均匀错动过程中，断层下盘一侧土体的破裂率先出现在地表拉剪区内，随错动量的增大 ...
Jianfeng Qi +3 more
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Unveiling Entropy‐Driven Hard‐Tough Synergy Mechanisms in High‐Entropy Carbonitride Ceramics
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT High‐entropy ceramics manifested promise for extreme environments, yet their phase stability and mechanical synergy mechanisms remain elusive. Herein, entropy‐difference carbonitrides, including (TaTiV)CN, (TaTiVNb)CN, and (TaTiVNbHf)CN, were designed and consolidated via spark plasma sintering.
Long Zhao +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The limited crack resistance of coarse grain boundaries and coarse interfaces leads to an incompatibility between high‐temperature strength and ductility in TiAl alloys. Tailoring stress‐oriented textures and multiscale heterogeneous interfaces can effectively impede crack propagation, thereby overcoming this trade‐off.
Kexuan Li +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Rationally designing an electrocatalyst to achieve stable and efficient urea oxidation reaction (UOR) is crucial but still challenging, especially for ampere‐level application. Herein, Mn and Fe dual‐doped Ni0.85Se (Mn/Fe–Ni0.85Se) catalyst is synthesized via a facile and scalable electrodeposition and followed by selenization.
Guanglin Zhu +6 more
wiley +1 more source
Coupled Structural Characteristics Boost Brazing Performance of Ti2AlNb Alloy
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Brazing of Ti2AlNb alloy is a pivotal technique for new generation aero‐engine lightweight structures, yet developing novel filler metal and achieving the extraordinary performance of titanium alloy brazed joints remains challenging. Here, this study designed an innovative filler metal (Ti70‐xZrxCu15Ni15) and developed inspired coupled ...
Yinchen Wang +13 more
wiley +1 more source
Dizhen xuebao, 2019 对鲜水河断裂带重磁异常进行向上延拓，通过计算观测面高度异常与延拓后异常之间的相关系数得出最佳向上延拓高度，该延拓高度所对应的延拓结果即为研究区构造背景产生的异常值。向上延拓结果显示布格重力异常值沿鲜水河断裂带自北西向南东逐渐增大，反映出下地壳底边界沿该方向呈升高趋势，可能由青藏高原地壳软弱物质 “东向逃逸” 所致。化极后ΔT磁异常延拓结果表明鲜水河断裂带南东段的康定—石棉以东为强磁性刚性基底。以鲜水河断裂带为分界的不同地块之间基底岩石及地层物性的不同是断裂带南北磁性差异的主导原因 ...
Yifei Ai, Jian Zhang
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