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Roy, Shibayan; Mitra, S. K.; Bose, Saswata

doi:10.1023/a:1018882408550

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…The oxidation of Cu is known to occur by its outward diffusion through the oxide scale to the gas interface, where it reacts with oxygen. 7,[11][12][13] Suppression of kinetics by direct obstruction of Cu migration by Al 2 O 3 particles has been discounted 4 because: (1) the particles are of insufficient quantity, and their constituents have insufficient mobility at these temperatures to form a solid diffusion barrier; and (2) the absence of logarithmic kinetics argues against blockage of pipe-diffusion pathways down the grain boundaries. Another possibility is that Al 3+ ions modify defect dynamics along the Cu-migration route.…”

Section: Resultsmentioning

confidence: 99%

The Oxidation Behavior of an ODS Copper Alloy Cu?Al2O3

Ogbuji

2004

Oxidation of Metals

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The oxidation behavior of wt.% Al 2 O 3 ), an ODS copper alloy of interest for aerospace structural application, was investigated by oxidation and two-step oxidation in a TGA. The results were compared with the oxidation kinetics of pure Cu and two other aerospace Cu alloys, and ). AL-15 exhibited the lowest oxidation rate from 500 to 650 • C. The superiority in oxidation resistance is thought to result from the Al 2 O 3 , and the two-step oxidation results suggest the Al 2 O 3 dissolves in the oxide scale, perhaps creating charge and stress fields that suppress oxidation by retarding the Cu diffusion rate.

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Section: Resultsmentioning

confidence: 99%

The Oxidation Behavior of an ODS Copper Alloy Cu?Al2O3

Ogbuji

2004

Oxidation of Metals

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“…Per hectare insecticide cost was Tk 4950.00 for Pineapple mono crop which was 1.6 percent of the total gross costs and Tk 4690.00 and Tk. 35430 for (Pineapple + papaya) and (Pineapple + Banana+Aroid) which was 1.18 and 9.4 percent of the total gross costs respectively (Roy et al, 1986). However, per hectare cost of irrigation for (Pineapple+Banana+Aroid) production Tk 6300.00 which constituted 1.67 percent of the total gross costs (Table 4).…”

Section: Estimation Of Costmentioning

confidence: 98%

A comparative profitability of pineapple-mono crop and pineapple intercrops of Modhupur area in Tangail district of Bangladesh

Sultan¹,

Islam²,

Islam³

et al. 2018

Asian Australas. J. Food. Saf. Secur.

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A survey study was conducted to estimate the cost, returns, relative profitability and practices of Pineapple mono-crop and Pineapple inter-crops production in Madhupur area of Tangail District. Data was collected personally through prepared interview schedule from 60 randomly selected Pineapple growers from Ausnara, Oronkhola, Sonia and Motel bazar union under Madhupur Upazila of Tangail District during July to October 2013. A simple random sampling was followed to select the farmers in the study area. Both tabular and statistical analyses were applied in this study. Cost and return analysis showed that total cost incurred for producing Pineapple mono crop, Pineapple+Papaya and Pineapple+Banana+Aroid were Tk.312849.72, Tk.395894.01 and Tk.377013.25 per hectare respectively. Per hectare net return for Pineapple + Papaya and Pineapple + Banana + Aroid production were Tk.492111.00 and Tk.195704.75 which were higher than that of Pineapple mono crop (Tk.157675.28). On the other hand BCR for Pineapple + Papaya and Pineapple + Banana + Aroid production were 2.24 and 1.52 which were higher than that of Pineapple mono crop (1.50). It represents that both pineapple mono-crop and pineapple inter-crops production are profitable among them Pineapple-inter crops cropping pattern is more profitable then Pineapple-mono crop. About 80% of pineapple growers grow papaya, banana, zinger, turmeric and aroids as intercrops with pineapple. The study identified some crucial problems and probable solutions suggested by the farmer. Finally, some policy recommendations were suggested and avenues for further research were shown. Asian Australas. J. Food Saf. Secur. 2018, 2(2), 56-64

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