研究领域主要是耐高温耐蚀材料设计与大型复杂薄壁零件整体精密铸造技术基础研究，在耐高温材料成分设计、组织结构表征、力学性能与断裂失效机制，耐蚀材料高温抗氧化、抗腐蚀性能与机理，以及大尺寸复杂薄壁零件整体精铸技术、组织和缺陷控制技术、本体性能研究与评估等方面取得了一系列具有科学意义和应用价值的研究成果，作为核心骨干成功研制出一种具有自主知识产权的新材料K4750合金，采用该合金制造的零件已应用在我国重要型号航空发动机上。

近期发表论文
在国内外有影响力的学术期刊发表SCI收录论文20多篇，其中国际金属材料科学领域TOP期刊论文10多篇，3篇论文分别获得2020年辽宁省金属学会优秀科技论文一等奖、二等奖和二等奖，授权和申请国家发明专利4项，起草和发布标准2项，代表性论文和专利如下：
1.Meiqiong Ou, Yingche Ma*, Kunlei Hou, Min Wang, Guangcai Ma, Kui Liu*, Effect of grain boundary precipitates on the stress rupture properties of K4750 alloy after long-term aging at 750°C for 8000h, Journal of Materials Science & Technology, 92 (2021) 11-20.
2.Kunlei Hou, Min Wang, Meiqiong Ou*, Haoze Li, Xianchao Hao, Yingche Ma*, Kui Liu, Effects of microstructure evolution on the deformation mechanisms and tensile properties of a new Ni-base superalloy during aging at 800°C, Journal of Materials Science & Technology, 68 (2021) 40-52.
3.Yanli Liu, Kunlei Hou, Meiqiong Ou*, Yingche Ma*, Kui Liu, The Oxidation behavior of K4750 alloy at temperatures between 750°C and 1000°C, Acta Metallurgica Sinica (English Letters), (2021) DOI: 10.1007/s40195-021-01235-z
4.KunleiHou, MeiqiongOu, Min Wang, XianchaoHao, Yingche Ma*, KuiLiu*, Low cycle and high cycle fatigue of K4750 Ni-based superalloy at 600 °C: analysis of fracture behavior and deformation mechanism, Materials Science & Engineering A, 820 (2021) 141588.
5.Xiaoxiao Li, Meiqiong Ou, Min Wang, Xiangdong Zha, Yingche Ma*, Kui Liu*, Microstructure evolution and stress rupture properties of K4750 alloys with various B contents during long-term aging, Journal of Materials Science & Technology 73 (2021) 108-115.
6.Xiaoxiao Li, Meiqiong Ou, Min Wang, Long Zhang, Yingche Ma*, Kui Liu*, Effect of boron addition on the microstructure and mechanical properties of K4750 nickel-based superalloy, Journal of Materials Science & Technology 60 (2021) 177-185.
7.Meiqiong Ou, Yingche Ma*, Weiwei Xing, Xianchao Hao, Bo Chen, Leilei Ding, Kui Liu*, Stress rupture properties and deformation mechanisms of K4750 alloy at the range of 650°C to 800°C, Journal of Materials Science & Technology, 35 (2019) 1270-1277.
8.Xiaoxiao Li, Meiqiong Ou*, Min Wang, Xianchao Hao, Yingche Ma*, Kui Liu, Effect of Co on microstructure and stress rupture properties of K4750 alloy, Acta Metallurgica Sinica (English Letters), 32 (2019) 1501-1510.
9.Kunlei Hou, Meiqiong Ou, Min Wang, Haoze Li, Yinche Ma*, Kui Liu*, Precipitation of η phase and its effects on stress rupture properties of K4750 alloy, Materials Science & Engineering A 763 (2019) 138137.
10.Meiqiong Ou, Yingche Ma*, Hualong Ge, Bo Chen, Shijian Zheng, Kui Liu*, Effect of long-term aging on the microstructure, stress rupture properties and deformation mechanisms of a new cast nickel base superalloy, Materials Science & Engineering A, 736 (2018) 76-86.
11.Meiqiong Ou, Yingche Ma*, Hualong Ge, Weiwei Xing, Yangtao Zhou, Shijian Zheng, Kui Liu, Microstructure evolution and mechanical properties of a new cast Ni-base superalloy with various Ti contents, Journal of Alloys and Compounds, 735 (2018) 193-201.
12.Meiqiong Ou, Xianchao Hao, Yingche Ma*, Ruichang Liu, Long Zhang, Kui Liu, Effect of carbon on the microstructure and stress rupture properties of a new Ni-Cr-W-Fe alloy for advanced ultra-supercritical power plants, Journal of Alloys and Compounds, 732 (2018) 107-115.
13.Meiqiong Ou, Yingche Ma*, Xianchao Hao, Baifang Wan, Tian Liang, Kui Liu, Effect of solution annealing on microstructure and mechanical properties of a Ni-Cr-W-Fe alloy, Journal of Materials Science & Technology, 33 (2017) 1300-1307.
14.欧美琼，刘扬，查向东，马颖澈，程乐明，刘奎. 一种新型镍基合金在超临界多种离子共存环境下的腐蚀行为，金属学报，52 (2016) 1557-1564.
15.欧美琼，马颖澈，张龙，王旻，丁磊磊，刘奎. 一种细化K4750镍基高温合金铸造试棒等轴晶晶粒的方法. 专利申请号202110876351.9，已受理.
16.马颖澈，欧美琼，姚卓，刘奎，洪杰，史凤岭，袁锁军，张龙，于海涛，李汉运，郑渠英. 一种K4750合金航空发动机WLHJX收缩变形的控制方法. 专利申请号201818008556.4，已受理.
17.张龙，马颖澈，欧美琼，刘奎，洪杰，袁锁军. 一种批量生产高纯净K4750铸造母合金的方法. 专利申请号201818001237.0，已受理.
18.马颖澈，刘奎，万柏方，郝宪朝，欧美琼，张龙，袁锁军，张顺南. 一种高强度镍基铸造高温合金及其热处理工艺.专利号ZL201618003787.7，已授权.