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Questions related from Shubrajit Bhaumik
I had a mineral oil of 460cSt (containing sulphur and phosphorus), after addition of nanparticles (carbon nano tubes and graphene) the viscosity decreased significantly. literatures says that the...
08 August 2018 9,551 1 View
A lubricant contains zinc oxide nano particles and carbon FMs, the coefficiet of friction is high while the wear scar diameter is less for the samples. The load was 392N @1200rpm @75degree C.
04 April 2018 3,185 6 View
Experiments were carried out using pin on disc apparatus (120N, 800rpm, a flat faced pin 10mm, room temperature) and four ball test(120N,800rpm , AISI 52100 balls , 75 degree C). The lubricant...
12 December 2017 3,636 2 View
Elastic modulus of Zinc Oxide nano particles
08 August 2017 8,095 2 View
Case I : An experiment was conducted using some additives. The additives formed a protective layer on the steel surfaces which reduced the roughness and hence h/Ra increased. Case II: When the...
07 July 2016 9,941 7 View
Graphene and carbon nano tubes shows better extreme pressure characteristics when used as additives.
07 July 2016 8,630 0 View
Specific Application please.
07 July 2016 3,469 2 View
Two steel surfaces after a tribo-test are to be considered.
06 June 2016 3,447 3 View
Mechanical properties influencing coefficnet of friction.
06 June 2016 1,416 2 View
Graphene shows better frictional properties than carbon nano tubes.
06 June 2016 2,659 1 View
A graphene platelet comes in between two steel contact during sliding under loads of 200N and 210N . The Coefficient of friction measured with 210N is less than 200N.
06 June 2016 3,398 0 View
Two lubricants were tested using a four-ball tester: one is a mineral oil of 460cSt and the other is a vegetable oil. The coefficient of friction in case of mineral oil was found to be much higher...
05 May 2016 9,142 3 View
A journal is having SNIP,IPP,SJR but is not indexed in SCI list of Thomson Reuters. Whether IPP is considered as impact factor of the journal?
04 April 2016 9,958 0 View
1g of multi wall carbon nano tubes(MWCNTs) and graphene are added to two test tubes containing vegetable oil. The tubes were left undisturbed. It was found that mwcnts settled much faster than...
04 April 2016 6,700 2 View
a model in abaqus has been developed. i have the contact pressure values.
02 February 2016 7,598 11 View
need to coat graphene on steel surface
02 February 2016 3,152 1 View
Two tests were carried out. One with a vegetable oil and the other with mineral oil. The mineral oil viscosity was almost twice than the vegetable oil. It was observed that the Coefficient of...
01 January 2016 9,758 6 View
A gear is not always made of AISI52100 steel.How can we relate the results from Four Ball Tests using AISI 52100 balls to real time gear?
12 December 2015 7,214 4 View
Why can't we use other material balls such as EN 24 in Four Ball Test?
12 December 2015 10,047 0 View
Zinc and iron particles are present in a lubricating oil. Which will have higher tendency to form oxide?
11 November 2015 6,295 1 View
Viscosity...Does lubricant viscosity decrease on addition of nanoparticles? An experiment was conducted with 5 concentration of carbon nano tubes in oil. the viscosity increase as comapred to that...
11 November 2015 2,715 11 View
Tensile test
10 October 2015 7,034 0 View
We have tested two samples of oils. One is pure while the other contains carbonaseous nano particles. To our surprise the following is observed : In case of the nano particles based oil the...
09 September 2015 6,516 10 View
An L9 orthogonal DOE was performed using Minitab. The S/N in case of frictional force is negative.The response of the frictional force and rpm were negative. But in case of other output...
07 July 2015 2,982 6 View
I performed two experiments - one with pure vegetable oil and other with vegetable oil containing graphite. The vegetable oil containing graphite showed lesser coeffient of friction than pure oil...
07 July 2015 2,008 16 View
I have mixed some particles in oil. And have taken the UVis of the sample after regular intervals in three different positions. On x-axis is "absorbance" and y-axis is "wavelength". The absorbance...
05 May 2015 3,156 7 View
A pin on disc experiment has been carried out acc to taguchi does. the response(outputs) are coefficient of friction , frictional force. In taguchi analysis , whether this experiment would be a...
03 March 2015 984 2 View
I tested with two different lubricants. With first lubricant, the coefficient of friction was 0.042 but wear rate was 7.32 But, with the second lubricant the coefficient of friction was 0.051 but...
01 January 2015 1,305 15 View
The oil used was vegetable oil and 160N load was applied. The rpm of the disc was 1500 and 2000. In both cases there has been an increase in weight gain after the test? while with 150N load there...
09 September 2014 8,618 11 View
SAE grade
07 July 2014 7,732 0 View
Any papers.
05 May 2014 8,240 8 View
Formula.
05 May 2014 5,671 10 View
Addition of additives in lubricant is to be called what?
05 May 2014 1,720 10 View
I have done an experiment using lubricant on a pin on disk apparatus. I have added some solid additives to the lubricant. To my surprise when we weighed the tested pin, the weight of the pin after...
04 April 2014 8,985 9 View
What would be its effect on flash and fire point if it is added in a lubricant.
03 March 2014 5,212 15 View
Nano particles such as copper oxide, zinc oxide and carbon nano tubes.
03 March 2014 3,170 35 View
Given data: Viscosity of the oil at 40 degrees is 416 cSt and viscosity of the oil at 100 degrees is 32 degree.
03 March 2014 7,895 4 View
Kindly let me know if you have any paper of modeling wear under lubrication
02 February 2014 4,740 1 View
In hertzian models we have models for spherical -spherical and spherical-flat, but flat-flat surface is not shown.
12 December 2013 1,039 5 View
Please let me know
12 December 2013 6,939 5 View
.
12 December 2013 4,697 5 View
Is it equal to maximum or average contact pressure? If no, then how can I determine asymptotic pressure?
12 December 2013 2,965 0 View
Eg: If steel is having a Young's modulus of "x" , then whatever we make geaometries with steel say it to be a hollow pipe or a solid rod the young's modulus of steel remains same as"x". then why...
11 November 2013 2,605 5 View
Does it break down the CNTs? In what way?
11 November 2013 6,440 15 View
Is it 1 TPa or is it same as that of open ended tubes?
10 October 2013 5,402 1 View
Long term stable dispersion is required.
07 July 2013 7,190 4 View
What can I conclude from the below attached file?
03 March 2013 1,049 2 View
Kindly let me know of any papers also.
02 February 2013 9,089 5 View
The composite is not in laminar.
02 February 2013 6,489 1 View
Uniformity is essential.
02 February 2013 432 0 View
An experiment of graphite, MWCNT and Graphene was conducted . And we observed different coefficiient of friction.
01 January 1970 1,770 0 View
additives used were graphite , graphene and multi wall carbon nano tubes in lubricant.
01 January 1970 5,455 2 View
Castor oil containing carbon particles is passed over a steel surface at room and high temperature.
01 January 1970 4,413 0 View
