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首页> 外文期刊>Journal of Materials Engineering and Performance >Design and Performance Evaluation of Al2O3-SiC Composite for Direct-Bonded Copper Substrate
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Design and Performance Evaluation of Al2O3-SiC Composite for Direct-Bonded Copper Substrate

机译：直接粘结铜基材Al2O3-SiC复合材料的设计与性能评价

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摘要

A computational material design approach is applied to propose a novel ceramic material for direct-bonded copper (DBC) substrate with enhanced thermal and structural performance. The material design inherently consists of many competing requirements that require careful decisions regarding key trade-offs in terms of material composition, inclusion size, shape, and distribution to achieve the target properties. The alumina-silicon (Al2O3-SiC) composite, as compared to commercial alumina, used in DBC is found to be the most suitable design among other candidates with improved thermal and structural properties. In order to study the performance characteristics and the effects of the new ceramic composite with improved properties in terms of structural behavior and fatigue life of the DBC substrate, the normal working and extreme thermal cycling conditions were simulated and analyzed using finite element method. The temperature, strain, and localized stress distribution within the substrate at a steady-state condition were analyzed, and the improved Coffin-Manson law was used to calculate the fatigue life of the substrate under extreme thermal cycling conditions. The proposed Al2O3-SiC composite is found to be more robust than the commercial alumina as DBC substrates considering the thermal-mechanical performance. The fatigue life cycle of the DBC substrate with the proposed material is predicted to be about two times longer than the commercial alumina DBC ceramic under transient thermal cycling test.
机译：应用计算材料设计方法，提出一种具有增强的热和结构性能的直接粘合铜（DBC）衬底的新型陶瓷材料。材料设计本身包括许多竞争要求，这些要求需要仔细决策，就材料成分，包含尺寸，形状和分布而言，以实现目标性质。与商业氧化铝相比，在DBC中使用的氧化铝 - 硅（Al2O3-SiC）复合材料是具有改善的热和结构性能的其他候选者中最合适的设计。为了在DBC衬底的结构行为和疲劳寿命方面研究新的陶瓷复合材料的性能特征和新陶瓷复合材料的影响，使用有限元法模拟和分析正常的工作和极端热循环条件。分析了基板内的温度，应变和局部应力分布，并使用改进的棺材 - 曼森法在极端热循环条件下计算衬底的疲劳寿命。考虑到热机械性能，发现所提出的Al2O3-SiC复合材料比商业氧化铝更稳定，如DBC基板。随着瞬态热循环试验，预测与所提出的材料的DBC衬底的疲劳寿命循环预测比商业氧化铝DBC陶瓷长约两倍。

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