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您的检索式：作者名="A.Chaudhari"
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| 1 | 压缩天然气发动机用气门和气门座圈的开发显示文摘气门座圈和气门对内燃机的性能、排放和可靠性起着重要作用。这些零件失效会导致内燃机性能恶化。由于压缩天然气(CNG)发动机的燃烧环境干燥,工作温度较高,会对气门座圈和气门的寿命产生不利的影响。Greaves cotton公司开发了1台由柴油机改制的单缸水冷气道喷射CNG发动机。开发中遇到的主要挑战是气门座圈和气门的磨损。为了避免故障,在座圈材料适应性、座面锥角、座面宽度、气门头部刚度、座圈与气门的同轴度和气门落座速度几方面进行了设计改进。通过修改设计成功地解决了气门和气门座圈的磨损问题,并通过发动机台架试验和车辆试验得到了验证。 | J.Shrivas G.Khairnar S.Pande Y.Hussaini A.Chaudhari 左彤梅 燕超鹏 | 2016 | 国外内燃机2016，48，6： | 4 |
| 2 | Structural,magnetic and dielectric properties of nano-crystalline Ni-doped BiFeO_(3) ceramics formulated by self-propagating high-temperature synthesis显示文摘Ni-doped BiFeO_(3) powders with the composition BiFe_(1-x)Ni_(x)O_(3)(x=0.05,0.1 and 0.15)were prepared by a self-propagating high-temperature synthesis(SHS),using metal nitrates as oxidizers and glycine as fuel.The X-ray diffraction(XRD)patterns depict that Ni-doped BiFeO_(3) ceramics crystallize in a rhombhohedral phase.The scanning electron micrographs of Ni-doped BiFeO_(3) ceramics show a dense morphology with interconnected structure.It is found that,the room-temperature magnetization measurements in Ni-incorporated BiFeO_(3) ceramics give rise to nonzero magnetization.The magnetization of Ni-doped BiFeO_(3) ceramics is significantly enhanced when Ni doping concentration reaches to x=0.1 at 5 K.The variations of dielectric constant with temperature in BiFe_(0.95)Ni_(0.05)O_(3),BiFe_(0.9)Ni_(0.1)O_(3) and BiFe_(0.85)Ni_(0.15)O_(3) samples exhibit clear dielectric anomalies approximately around 450℃,425℃and 410℃respectively,which correspond to antiferromagnetic to paramagnetic phase transition of the parent compound BiFeO_(3). | Yogesh A.CHAUDHARI Chandrashekhar M.MAHAJAN Prashant P.JAGTAP Subhash T.BENDRE | 2013 | Journal of Advanced Ceramics2013，2，2： | 3 |
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