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Accelerated screening methods for predicting lubricant performance in refrigerant compressors

Description: As the result of a thorough literature search and consultation with manufacturers of compressors, a specimen testing program is proposed to simulate specific contacts in components of compressors. Specimen testing will be conducted using a high pressure tribometer. Specific components to be simulated, with their approximate operating and environmental conditions, are identified. A list of references, related to compressors lubrication, friction and wear, is given in the Appendix.
Date: March 1, 1993
Creator: Cusano, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Accelerated screening methods for predicting lubricant performance in refrigerant compressors: Final report

Description: The tribological characteristics of various lubricant/refrigerant mixtures have been experimentally investigated by means of a unique high pressure tribometer (HPT). In order to identify more effective bench testers for screening lubricants for compressors, a comparison is made between data obtained from the HPT, Four Ball and Falex{trademark} testers, and those obtained from accelerated component (compressor) tests. Part 1 of this study is geared toward a comparison between data obtained from … more
Date: November 1, 1994
Creator: Cusano, C.; Yoon, H. & Poppe, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Accelerated screening methods for predicting lubricant performance in refrigerant compressors. Progress report, May 1, 1993--December 31, 1993

Description: As part of an overall testing program to identify more effective bench testers for screening oils for compressors, a comparison is made in this report between data obtained from a Falex specimen tester and those obtained from a high pressure tribometer (HPT). The Falex data were supplied by three compressor manufacturers. These data were mainly obtained by bubbling refrigerants through the oil, whereas, the data from the HPT are based on environmental (temperature and pressure) found in specifi… more
Date: January 1, 1994
Creator: Cusano, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Accelerated screening methods for predicting lubricant performance in refrigerant compressors. Quarterly progress reports, 1 October 1992--31 December 1992 and 1 January 1993--31 March 1993

Description: As the result of a thorough literature search and consultation with manufacturers of compressors, a specimen testing program is proposed to simulate specific contacts in components of compressors. Specimen testing will be conducted using a high pressure tribometer. Specific components to be simulated, with their approximate operating and environmental conditions, are identified. A list of references, related to compressors lubrication, friction and wear, is given in the Appendix.
Date: March 1, 1993
Creator: Cusano, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Additives for high temperature liquid lubricants. Final report

Description: The purpose of this task was to perform research for the Department of Energy (DOE) on the synthesis and characterization of additives for liquid lubricants which could lead to significant improvements in the major tribological task area of friction and wear reduction at high temperature. To this end JPL surveyed candidate precursor compounds which are soluble in liquid lubricants, synthesized the most promising of these materials, characterized them and submitted these additives to National In… more
Date: January 15, 1994
Creator: Yavrouian, A. H.; Repar, J.; Moran, C. M.; Lawton, E. A. & Anderson, M. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Adhesion, Deformation and Friction for Self-Assembled Monolayers on Au and Si Surfaces

Description: Using Interracial Force Microscopy (IFM), we investigated the tribological behavior of hexadecanethiol monolayer on Au and films of octadecyltrichlorosilane (ODTS), perfluorodecyltrichlorosilane (PFTS) and dodecane on Si. We observe a strong correlation between hysteresis in a compression cycle (measured via nanoindentation) and friction. Additionally, we suggest that the amount of hysteresis and friction in each film is related to its detailed molecular structure, especially the degree of mole… more
Date: July 7, 1999
Creator: Houston, J. E.; Hsung, R. P.; Kiely, J. D.; Mulder, J. A. & Zhu, X. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Advanced Diesel Engine Component Development Program, final report - tasks 4-14

Description: The Advanced Diesel Engine Component Development (ADECD) Program is a multi-year, multi-phase effort to develop and demonstrate the critical technology needed to advance the heavy-duty low heat rejection (LHR) engine concept for the long-haul, heavy-duty truck market. The ADECD Program has been partitioned into two phases. The first phase, Phase 1, was completed in 1986, resulting in definition of the Advanced Diesel Reference Engine (ADRE)III. The second phase, Phase 11/111, examines the feasi… more
Date: November 1, 1994
Creator: Kaushal, T. S. & Weber, K. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Advanced Materials Development Program: Ceramic Technology for Advanced Heat Engines program plan, 1983--1993

Description: The purpose of the Ceramic Technology for Advanced Heat Engines (CTAHE) Project is the development of an industrial technology base capable of providing reliable and cost-effective high temperature ceramic components for application in advanced heat engines. There is a deliberate emphasis on industrial'' in the purpose statement. The project is intended to support the US ceramic and engine industries by providing the needed ceramic materials technology. The heat engine programs have goals of co… more
Date: July 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of cathodic arc deposited amorphous hard carbon films to the head/disk tribology

Description: Amorphous hard carbon films deposited by filtered cathodic arc deposition exhibit very high hardness and elastic modulus, high mass density, low coefficient of friction, and the films are very smooth. All these properties are beneficial to applications of these films for the head/disk interface tribology. The properties of cathodic arc deposited amorphous carbon films are summarized, and they are compared to sputter deposited, hydrogenated (CH{sub x}), and nitrogenated (CN{sub x}) carbon films … more
Date: April 1998
Creator: Anders, S.; Bhatia, C. S.; Fong, W.; Lo, R. Y. & Bogy, D. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ARTI refrigerant database

Description: The Refrigerant Database is an information system on alternative refrigerants, associated lubricants, and their use in air conditioning and refrigeration. It consolidates and facilitates access to property, compatibility, environmental, safety, application and other information. It provides corresponding information on older refrigerants, to assist manufacturers and those using alterative refrigerants, to make comparisons and determine differences. The underlying purpose is to accelerate phase … more
Date: February 1, 1997
Creator: Calm, J.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aspects of surface generation in orthogonal ultraprecision machining

Description: The depth of the plastically deformed layer at the workpiece surface which resulted in the orthogonal ultraprecision machining of Cu over the range of uncut chip thicknesses of 0.01-10 {mu}m was investigated. Two tools with the same nominal geometry but with differing edge geometries were used to machine both Te-Cu and fine grain Cu. Tool edge geometries were characterized by atomic force microscopy, taking into account the AFM cantilever tip radius. Magnitudes of the measured depths appear to … more
Date: October 1, 1994
Creator: Lucca, D. A.; Seo, Y. W. & Rhorer, R. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Aspects of the Tribology of the Plastic Bonded Explosive LX-04

Description: The coefficient of friction, {mu}, of the plastic bonded explosive (PBX) LX-04 was measured on stainless steel, aluminum, Teflon and the explosive itself as a function of temperature between ambient and 135 C at a rotational speed of 0.0025 rad/sec{sup -1}. An optical profilometer was used to analyze the mean surface roughness, R{sub a}, of the various materials. LX-04 is a composite of the explosive 1,3,5,7-tetranitroazacyclooctane (HMX) and Viton A in an 85/15 weight ratio. The average roughn… more
Date: July 8, 2004
Creator: Hoffman, D. M. & Chandler, J. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Aspects of the Tribology of the Plastic Bonded Explosive (PBX) 9404

Description: The coefficient of friction, {mu}, of the plastic bonded explosive (PBX) 9404 was measured on stainless steel, aluminum, Teflon and the explosive itself as a function of temperature between ambient and 135 C at a rotational speed of 0.0025 rad/sec{sup -1}. An optical profilometer was used to analyze the mean surface roughness, R{sub a}, of the various materials. PBX 9404 is a composite of the explosive 1,3,5,7-tetranitroazacyclooctane (HMX) chloroethyl phosphate (CEF) and nitrocellulose in an 9… more
Date: July 8, 2004
Creator: Hoffman, D. M. & Chandler, J. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Assessment of government tribology programs

Description: An assessment has been made to determine current tribology research and development work sponsored or conducted by the government. Data base surveys and discussions were conducted to isolate current projects sponsored primarily by 21 different government organizations. These projects were classified by subject, objective, energy relevance, type of research, phenomenon being investigated, variables being studied, type of motion, materials and application. An abstract of each project was prepared… more
Date: September 1, 1985
Creator: Peterson, M.B. & Levinson, T.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessment of industrial attitudes toward generic research needs in tribology

Description: Based on extended discussions during visits with 27 companies representing 13 different parts of the tribology industry (such as bearings, lubricants, coatings, powerplants), it is apparent that only a tiny fraction of the large sums publicly reported as R and D expenditures by industry are used to fund generic tribology research. For example, of the greater than $2 B expenditures reported for R and D in the lubricants sector for 1982, the estimated total for generic tribology research was $12 … more
Date: September 1, 1985
Creator: Sibley, L.B.; Zlotnick, M. & Levinson, T.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessment of technical strengths and information flow of energy conservation research in Japan. Volume 2. Background document

Description: Purpose of this study is to explore the status of R and D in Japan and the ability of US researchers to keep abreast of Japanese technical advances. US researchers familiar with R and D activities in Japan were interviewed in ten fields that are relevant to the more efficient use of energy: amorphous metals, biotechnology, ceramics, combustion, electrochemical energy storage, heat engines, heat transfer, high-temperature sensors, thermal and chemical energy storage, and tribology. The researche… more
Date: June 1, 1985
Creator: Hane, G.J.; Lewis, P.M.; Hutchinson, R.A.; Rubinger, B. & Willis, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Atomic oxygen interaction with nickel multilayer and antimony oxide doped MoS{sub 2} films

Description: Sputtered MoS{sub 2} is a solid lubricant capable of ultralow friction coefficients (below 0.05) load-bearing capacity. Since it exhibits low friction in vacuum, low outgassing rate, is non-migrating and lacks organic binders, this material is an attractive lubricant for space mechanisms. To exploit these new materials to their fullest potential, designers of space-based motion systems require data on the effects of atomic oxygen exposure on dense, sputtered MoS{sub 2}. This paper describes the… more
Date: December 31, 1994
Creator: Dugger, M.T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ceramics Technology Project database: September 1991 summary report

Description: The piston ring-cylinder liner area of the internal combustion engine must withstand very-high-temperature gradients, highly-corrosive environments, and constant friction. Improving the efficiency in the engine requires ring and cylinder liner materials that can survive this abusive environment and lubricants that resist decomposition at elevated temperatures. Wear and friction tests have been done on many material combinations in environments similar to actual use to find the right materials f… more
Date: June 1, 1992
Creator: Keyes, B. L. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ceramics Technology Project database: September 1991 summary report. [Materials for piston ring-cylinder liner for advanced heat/diesel engines]

Description: The piston ring-cylinder liner area of the internal combustion engine must withstand very-high-temperature gradients, highly-corrosive environments, and constant friction. Improving the efficiency in the engine requires ring and cylinder liner materials that can survive this abusive environment and lubricants that resist decomposition at elevated temperatures. Wear and friction tests have been done on many material combinations in environments similar to actual use to find the right materials f… more
Date: June 1, 1992
Creator: Keyes, B.L.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization and performance of DLC films synthesized by plasma and ion beam techniques

Description: Diamond-like carbon (DLC) films have been deposited on dissimilar substrates using three different deposition processes. Two well-studied methods, employing cathodic arcs and rf-plasma self-bias, have been used. These two processes differ in that cathodic arc processes use gas pressures less than 1 mtorr and deposit atomic ions with energies less than 100 eV, while rf-plasma self-bias processes use gas pressures greater than 1 mtorr and deposit molecular ions with energies greater than 100 eV. … more
Date: September 1, 1994
Creator: Walter, K. C.; Kung, H. & Levine, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characterization of transfer layers on steel surfaces sliding against diamondlike carbon in dry nitrogen

Description: Transfer layers on sliding steel surfaces play important roles in tribological performance of diamondlike carbon films. This study investigated the nature of transfer layers formed on M50 balls during sliding against diamondlike carbon (DLC) films (1.5 {mu}m thick) prepared by ion-beam deposition. Long-duration sliding tests were performed with steel balls sliding against the DLC coatings in dry nitrogen at room temperature and zero humidity. Test results indicated that the friction coefficient… more
Date: March 1, 1995
Creator: Erdemir, A.; Bindal, C.; Pagan, J. & Wilbur, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Comparative surface and nano-tribological characteristics of nanocomposite diamond-like carbon thin films doped by silver

Description: In this study we have deposited silver-containing hydrogenated and hydrogen-free diamond-like carbon (DLC) nanocomposite thin films by plasma immersion ion implantation-deposition methods. The surface and nano-tribological characteristics were studied by x-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and nano-scratching experiments. The silver doping was found to have no measurable effect on sp2-sp3 hybridization of the hydrogenated DLC matrix and only a slight effect on … more
Date: July 10, 2008
Creator: Zhang, Han-Shen; Endrino, Jose L. & Anders, Andre
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Conservation and renewable energy technologies for transportation

Description: The Office of Transportation Technologies (OTT) is charged with long-term, high-risk, and potentially high-payoff research and development of promising transportation technologies that are unlikely to be undertaken by the private sector alone. OTT activities are designed to develop an advanced technology base within the US transportation industry for future manufacture of more energy-efficient, fuel-flexible, and environmentally sound transportation systems. OTT operations are focused on three … more
Date: November 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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