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| 1 | Nanoindentation and Wear Characteristics of Al 5083/SiC_p Nanocomposites Synthesized by High Energy Ball Milling and Spark Plasma Sintering显示文摘Al 5083/10 wt% SiC p nano composites have been synthesized by means of high energy ball milling followed by spark plasma sintering (SPS). Nano composites produced via this method exhibited near-theoretical density while retaining the nano-grained features. X-ray diffraction (XRD) analysis indicated that the crystalline size of the ball milled Al 5083 matrix was observed to be ~25 nm and it was coarsened up to ~30 nm after SPS. Nano indentation results of nano composites demonstrated a high hardness of ~280 HV with an elastic modulus of 126 GPa. Wear and friction characteristics with addition of SiC p reinforcement exhibited significant improvement in terms of coefficient of friction and specific wear rate to that of nano structured Al 5083 alloy. The reduction in specific wear rate in the nanocomposite was mainly due to the change of wear mechanism from adhesive to abrasive wear with the addition of SiC p which resulted in high hardness associated with nano-grained microstructure. | Sivaiah Bathula Saravanan M Ajay Dhar | 2012 | Journal of Materials Science & Technology2012，28，11： | 3 |
| 2 | Enhanced thermoelectric performance in p-type ZrCoSb based half-Heusler alloys employing nanostructuring and compositional modulation显示文摘ZrCoSb based half-Heusler(HH)alloys have been widely studied as a p-type thermoelectric(TE)material for power generation applications in the mid-temperature regime.However,their intrinsically high thermal conductivity has been found to be detrimental for the improvement in their thermoelectric figure-of-merit(ZT),which presently is far below unity.In the current work,a state-of-the-art ZT~1.1 at 873 K was realized in an optimized composition of nanostructured Zr1-xHfxCoSb_(0.9)Sn_(0.1) HH alloys by employing compositional modulation i.e.grain-by-grain compositional variations,which leads to a substantial increase in its power factor coupled with a concurrent decrease in its thermal conductivity.Significant reduction in the phonon mean-free-path is observed on Hf substitution,which is comparable to the average crystallite size(~25 nm),thus leading to a very low thermal conductivity of~2.2Wm^(-1)K^(-1) at 873 K,which is amongst the lowest reported in HH alloys.The TE device characteristics,estimated using cumulative temperature dependence model for quantitative evaluation of TE performance,yielded an output power density of~10 Wcm2 with a leg efficiency of~10%in the optimized composition of nanostructured Zr_(1-x)Hf_(x)CoSb_(0.9)Sn_(0.1) HH alloys,which is comparable to the reported efficiencies of other state-of-the-art TE materials. | Nagendra S.Chauhan Sivaiah Bathula Avinash Vishwakarma Ruchi Bhardwaj Kishor Kumar Johari Bhasker Gahtori Ajay Dhar | 2019 | Journal of Materiomics2019，5，1： | 3 |
| 3 | Review on the phosphate-based conversion coatings of magnesium and its alloys显示文摘Magnesium(Mg)and its alloys are lightweight as well as biocompatible and possess a high strength-to-weight ratio,making them suitable for many industries,including aerospace,automobile,and medical.The major challenge is their high susceptibility to corrosion,thereby limiting their usability.The considerably lower reduction potential of Mg compared to other metals makes it vulnerable to galvanic coupling.The oxide layer on Mg offers little corrosion resistance because of its high porosity,inhomogeneity,and fragility.Chemical conversion coatings(CCs)belong to a distinct class because of underlying chemical reactions,which are fundamentally different from other types of coating.Typically,a CC acts as an intermediate sandwich layer between the base metal and an aesthetic paint.Although chromate CCs offer superior performance compared to phosphate CCs,yet still they release carcinogenic hexavalent chromium ions(Cr^(6+));therefore,their use is prohibited in most European nations under the Registration,Evaluation,Authorization and Restriction of Chemicals legislation framework.Phosphate-based CCs are a cost-effective and environment-friendly alternative.Accordingly,this review primarily focuses on different types of phosphate-based CCs,such as zinc,calcium,Mg,vanadium,manganese,and permanganate.It discusses their mechanisms,current status,pretreatment practices,and the influence of various parameters-such as pH,temperature,immersion time,and bath composition-on the coating performance.Some challenges associated with phosphate CCs and future research directions are also elaborated. | Debasis Saran Atul Kumar Sivaiah Bathula David Klaumünzer Kisor K Sahu | 2022 | International Journal of Minerals,Metallurgy and Materials2022，29，7： | 2 |
| 4 | Preparation of novel antiproliferative emodin derivatives and studies on their cell cycle arrest, caspase dependent apoptosis and DNA binding interaction显示文摘 | T. Narender P. Sukanya Komal Sharma Surendar Reddy Bathula | 2013 | Phytomedicine2013，，： | 2 |
| 5 | Microstructural features and mechanical properties of Al 5083/SiC p metal matrix nanocomposites produced by high energy ball milling and spark plasma sintering显示文摘 | Sivaiah Bathula R.C. Anandani Ajay Dhar A.K. Srivastava | 2012 | Materials Science & Engineering A2012，，： | 1 |
| 6 | Multifunctional nanoparticles delivering small interfering RNA and doxorubi- cin overcome drug resistance in cancer 显示文摘 | CHEN Y BATHULA S R LI Jun | 2010 | J Biol Chem2010，285，22： | 1 |
| 7 | Targeted nanopartides delirses siRNA to melanoma显示文摘 | Chert Y Bathula SR Yang Q | 2010 | J Invest Dermatol2010，130，12： | 1 |
| 8 | Enhancedthermoelectric figure-of-merit in spark plasma sinterednanostructured n-type SiGe alloys显示文摘 | Bathula S Jayasimhadri M Singh N | 2012 | Applied PhysicsLetters2012，101，21： | 1 |
| 9 | Band structure and transport studies of copper selenide : An efficient thermoe- lectric material显示文摘 | Tyagi K Gahtori B Bathula S | 2014 | Applied Physics Letters2014，105，17： | 1 |
| 10 | Targeted nanopartieles deliver siRNA to melanoma显示文摘 | Chen Y Bathula S R Yang Q | 2010 | J Invest Dermatol2010，130，12： | 1 |
| 11 | Complete second bran- chial cleft anomaly presenting as a fistula and a tonsillar cyst:an interesting congenital anomaly显示文摘 | Thottam PJ Bathula SS Poulik JM | 2014 | Ear Nose Throat J2014，93，1011： | 1 |
| 12 | Multifunctional nanoparticles delivering small interfering RNA and doxorubicin overcome drug resistance in cancer 显示文摘 | Chen Y Bathula SR Li J | 2010 | J Biol Chem2010，285，22： | 1 |
| 13 | Cadherin expression, vectorial active transport, and metallothionein isoform 3 mediated EMT/MET responses in cultured primary and immortalized human proximal tubule cells显示文摘 | Slusser A Bathula CS Sens DA | 2015 | PLoS One2015，10，12： | 1 |
| 14 | Ownership concentration,board characteristics and firm performance:a contingency framework显示文摘 | Bathula H Singh D | 2015 | Management Decision2015，53，5： | 1 |
| 15 | Novel cationic lipid that delivers siRNA and enhances therapeutic effect in lung cancer cells 显示文摘 | Chen Y Sen J Bathula SR | 2009 | Mol Pharm2009，6，3： | 1 |
| 16 | The pharmacologic treatment of intensive care unit delirium: a systematic review显示文摘 | Bathula M Gonzales JP | 2013 | Ann Phannacother2013，47，9： | 1 |
| 17 | Preparation of novel antiproliferative emodin derivatives and studies on their cell cycle arrest, caspase dependent apoptosis and DNA binding interaction显示文摘 | T. Narender P. Sukanya Komal Sharma Surendar Reddy Bathula | | Phytomedicine0，，： | 1 |
| 18 | Multifunctional nanoparticles delivering small interfering RNA and doxorubicin overcome drug resistance in cancer显示文摘 | Chen YC Bathula SR Li J | 2010 | J Biol Chem2010，285，22： | 1 |
| 19 | Distinct neuropsychologi- cal subgroups in typically developing youth inform heterogeneity in children with ADHD显示文摘 | Fair DA Bathula D Nikolas MA | 2012 | Proc Natl Acad Sci U S A2012，109，17： | 1 |
| 20 | Microstructural features and mechanical properties of Al 5083/SiCp metal matrix nanocomposites produced by high energy ball milling and spark plasma sintering显示文摘 | BATHULA S ANANDANI R C DHAR A SRIVASTAVA A K | | 0，，： | 1 |
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