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BACKGROUND Malignant adenomyoepithelioma (AME) of the breast is a rare tumor in which malignancy can arise from either epithelial or myoepithelial components, or from both cell types. The incidence and prognosis of malignant AME of the breast are difficult to assess due to its rarity. Therefore, the optimal treatment for this disease is still controversial. CASE SUMMARY We present two middle-aged women (48 and 56 years old) with malignant AME of the breast. Core needle biopsy was performed before surgery. However, breast adenoma and malignant tumors were observed. The preoperative diagnosis of malignant AME of the breast is still challenging for pathologists and clinicians. Both patients underwent mastectomy and sentinel lymph node biopsy, both of which were negative, followed by adjuvant chemotherapy. CONCLUSION The follow-up duration of the two patients was two years and four months, respectively. No signs of relapse or metastasis have been observed thus far.

A graphite mold was filled with a mixed powder of aluminum and graphene. It was evacuated to 2×10−1 Pa, pre-pressed under 10 MPa, heated to 450 °C where it was kept for 5 min, pressed again under 40 MPa, heated to 600 °C where it was kept for another 5 min to prepare graphene/aluminum (G/Al) composites. The effect of the graphene content on the microstructure, and thermal, electrical, mechanical and anticorrosive properties of the composites was investigated. Results indicate that when the graphene content is 0.5 wt.%, it is uniformly dispersed at grain boundaries in the Al matrix. Compared to pure Al the resulting composite has thermal and electrical conductivities that are respectively 7.1 % and 4% higher, tensile strength and hardness that are 30.6 % and 44% higher, and a corrosion resistance that is 31% higher. When the graphene content exceeds 0.5 wt.%, it agglomerates at grain boundaries in the Al matrix, leading to a decrease of all the above-mentioned properties.

采用电场压力激活辅助合成工艺（Field activated and pressure assisted synthesis process （FAPAS））制备铜基石墨烯复合材料，研究不同的石墨烯含量对铜基体材料的微观结构和性能的影响机理。结果表明，石墨烯的添加能提高材料的位错密度、阻止位错在晶界移动，硬度提升17.6%；由于石墨烯添加量少，对铜基复合材料的位错密度和晶粒尺寸影响有限，片状的石墨烯能有效地弥补制备产生的缺陷，使材料的热导率和电导率分别提升2.9%和4.4%；石墨烯的添加使腐蚀电池两极间的电位差减小，降低了铜离子在氧化膜中的扩散能力，使复合材料的阻抗提升5.3%，腐蚀电流密度下降28.2%，有效地提升了铜基复合材料的耐腐蚀性能。铜基石墨烯复合材料的石墨烯最佳添加量为0.5 wt.%。