By Topic

IEEE Transactions on Components, Hybrids, and Manufacturing Technology

Issue 1 • Date March 1979

Filter Results

Displaying Results 1 - 25 of 33
  • Editor's Note

    Publication Year: 1979, Page(s): 1
    Request permission for commercial reuse | PDF file iconPDF (72 KB)
    Freely Available from IEEE
  • Who's Who in CHMT

    Publication Year: 1979, Page(s): 2
    Request permission for commercial reuse | PDF file iconPDF (81 KB)
    Freely Available from IEEE
  • Notes from the Associate Editor

    Publication Year: 1979, Page(s): 3
    Request permission for commercial reuse | PDF file iconPDF (118 KB)
    Freely Available from IEEE
  • Distribution of Arc Duration and Material Wear Due to Arc for Ag, Cu, and Pd Contacts

    Publication Year: 1979, Page(s):20 - 24
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    An apparatus to measure the arc duration in moving contacts has been developed, which not only measures a breaking arc duration for each contact operation, but also integrates the durations of all arcs occurring during the contact operating period. The apparatus is applied to measure the distribution of arc duration and to find the relationship between material wear and integrated arc duration. Ag... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Effect of Fretting on the Contact Resistance of Aluminium with Different Contact Materials

    Publication Year: 1979, Page(s):25 - 31
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    The effect of fretting on the contact resistance of aluminium wire (EC grade) and different plating materials (Ag, Cd, Ni, Sn, Zn) has been studied. The fretting tests were conducted with simulated connector configurations using a differential thermal expansion fixture to produce fretting damage. In addition, the waveforms of the contact voltage, scanning electron microscopy (SEM), and X-ray fluor... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Separation of Surface and Bulk Gases in Contact Materials of Vacuum Switches-Determination of Gases and Effect on Vacuum Breakdown

    Publication Year: 1979, Page(s):4 - 8
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    Meaningful analysis for very small quantities of gases in contacts can be obtained only by the method which permits differentiating between surface and bulk gases. The graphite capsule method and copper bath method in vacuum fusion analysis were compared, and the surface area variation method and two-stage gas extraction method were investigated for the separation of surface and bulk gases. As a r... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Diffusion Effects of the Heat Treatment of Au-Ag on Fe-Ni Dry-Sealed Reeds

    Publication Year: 1979, Page(s):116 - 119
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Outward diffusion of Fe, Ni, and, Mn, and inward diffusion of Au, are two significant effects of the heat treatment of drysealed reeds consisting of Au-Ag plated on an Fe-Ni alloy with Mn added for fabrication characteristics. Diffusion coefficients and activation energies for the outward diffusion of Mn and the inward diffusion of Au are evaluated. Probable reasons for the failure modes of cold w... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High-Current Brushes, Part III: Performance Evaluation for Sintered Silver-Graphite Grades

    Publication Year: 1979, Page(s):84 - 89
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    The results of varying the material composition, specifically the metal mass fraction, on the performance of silver-graphite brushes at high-current densities (0.8 MA/m2) in a carbon dioxide atmosphere, have been evaluated. Material properties which were measured included the brush density, electrical conductivity, and hardness. These properties were used in the evaluation of the brush ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Lubrication Quantity: Observations of the Effects on Gold Sliding Contact Wear Character and in situ Contamination Formation

    Publication Year: 1979, Page(s):145 - 149
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    It has been observed that for certain slip-ring assemblies the wear character is altered by varying lubricant quantity. These observations were made on gold alloy sliding contacts tested under closely controlled laboratory conditions and on similar contacts taken from field installations. For thin-film boundary lubrication, the wear process follows the adhesive and abrasive modes set forth by Antl... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Material Transfer of Composite Contact Materials

    Publication Year: 1979, Page(s):15 - 19
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB)

    Composite technology provides very promising possibilities of improving one property of a given material without changing the other for the worse. The material transfer behavior of some fiber composite materials like AgNi and CuPd has been studied. Fiber composite contact materials can be fabricated in a simple and thus inexpensive way by bundling and simultaneous deformation of clad wires. It was... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Shunts for High-Current Density Brushes

    Publication Year: 1979, Page(s):89 - 94
    Cited by:  Papers (5)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    The conventional shunt size cannot be maintained with brush body current densities in the range of 1000A/in2(1.55 MA/m2) and higher. The large shunts which are necessary to preserve low-voltage drops and acceptable temperatures ate found to be heavy and stiff. Brush body voltage drop may also become a significant contributor to electrical power loss. With bulky shunt leads, i... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electron-Beam Technology in Switch Contacts

    Publication Year: 1979, Page(s):61 - 65
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    The original concept was to develop a composite strip of material for switch contacts, such that the silver portion is suitably bonded to the base metal such as copper, phosphor bronze, or beryllium copper. The requirements were a metallurgically sound reproducible-nonporous uniform ductile bond. Electron-beam welding technology meets these requirements for joining switch contact materials. Fine s... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Direct Observation for the Effect of Electric Current on Contact Interface

    Publication Year: 1979, Page(s):76 - 80
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    The conditions of the contact interface affect contact resistance characteristics. Therefore, information of the contact interface is very important for the study of contact performance. However, a real contact area, which carries the electric current path, is quite small. If the area can be observed directly, much information of the contact interface will be obtained. Such an investigation has no... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Digital Model of Switching Element Contact Surface

    Publication Year: 1979, Page(s):108 - 110
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Real contacts adhere to one another only in separate elements of surface, creating so-called contact microfields. This is caused by a lack of perfectly smooth and planar contact elements. Irregularities of contact surfaces cause, in the initial phase of closing contacts, only small surfaces of contact and, moreover, not in many points. As contacts begin to draw nearer, the next irregularities of s... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Comparison for the Effects of Various Forms of Silicon Contamination on Contact Performance

    Publication Year: 1979, Page(s):56 - 61
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (944 KB)

    In recent years increased concern has been noted for the effect of silicon contamination on the performance of electrical contacts. Several recent papers have described the effects of silicone contamination on contact behavior. Since contact contamination for the element silicon can exist as both organosilicon and inorganic mineral compounds, a study is made on the effects for the type of silicon ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Erosion Behavior of Several AgCdO Materials-A Comparison Between Actual Contactors and a Testing Machine

    Publication Year: 1979, Page(s):52 - 55
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    Contact materials, several AgCdO and one AgZnO, prepared either by internal oxidation or by means of powder metallurgy are tested on a welding-erosion testing machine. Results are then compared with those obtained on actual contactors, operating in AC4utilization category. This information is taken into account for ranking the materials according to the erosion criterion which ultimatel... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Testing of Sliding Electrical Contacts for Homopolar Generators

    Publication Year: 1979, Page(s):111 - 115
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    Due to the recent interest in homopolar generators as pulsed power supplies, the need has arisen for pulsed brush data on slip rings at high current levels and high surface velocities. Tests were conducted to examine the effect of varying the apparent area of contact on the coefficient of friction, voltage drop, and wear rate. Brush areas from 0.806-3.23 cm2were individually tested at c... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electrical Transition Interfaces at Aluminum Terminations

    Publication Year: 1979, Page(s):37 - 40
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    The electrical connection between an aluminum (Al) conductor and a contact surface of some other metal-transition interface-has under certain circumstances exhibited contact resistance characteristics that are different from those between two Al members. Because these characteristics change the quality of the conducting path, it is essential that they be controlled. Electrical test interfaces incl... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Low Expansivity Organic Substrate for Flip-Chip Bonding

    Publication Year: 1979, Page(s):140 - 144
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    Organic substrate materials with thermal expansion coefficients (TEC) approaching that of silicon have been fabricated with laminate composites using DuPont's Kevlar® fiber. When combined with controlled-collapse solder chip joining technology, chip-to-substrate interconnections are essentially free of fatigue failure caused by thermal cycling. This failure mode limits the ultimate silicon ch... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Motor Control Switching Performance of Cu-CdO Contacts in a Helium Atmosphere

    Publication Year: 1979, Page(s):124 - 126
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    An investigation of the arc rupture capacity and electrical endurance of Cu-l0 weight percent CdO and Ag-l0 weight percent CdO in motor control gear. In addition, the arc rupture capacity and electrical endurance of Cu-l0 weight percent CdO in helium at 1 atm is presented. Cu-CdO contacts in a helium atmosphere are observed to perform motor control switching duty with similar electrical performanc... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Mechanical Load Aspects of High-Current Brush System Design

    Publication Year: 1979, Page(s):95 - 99
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    Selection of proper mechanical loading is necessary to assure satisfactory brush operation in rotating electrical machines. Irregularities in the moving surface produce forces such as brush inertia and holder friction which alter the contact force. The range of force variation depends upon controllable factors in the brush system design. For high metal-content brushes operating in an inert atmosph... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Automated Measuring Methods for Discharge Durations and Energy in Electrical Contacts

    Publication Year: 1979, Page(s):65 - 70
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    Contact phenomena are very complicated, and the measured data are scattered in wide range. Therefore, a large volume of data is required to analyze the contact phenomena. At this time, some new fully automated methods for the measurements of discharge are described. Next, the measuring method for arc duration and arc energy is shown. The photo electron multiplier tube is used for this purpose. The... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Ionic Contamination Detection System with Improved Performance for Quantizing Residual Ionic Species

    Publication Year: 1979, Page(s):134 - 139
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    Mildly activated rosin flux is commonly used to clean mating metallic surfaces during soldering operations. This practice is generally recognized as necessary and usually promotes a good soldered connection. However, the active constituents in fluxes are often ionic species, which, if not adequately removed, might lead to electrical surface leakage and unacceptably low circuit reliability. Therefo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pulsed High-Power Brush Research, Part III: Experiments at 15.5 MA/m2and 277m/s

    Publication Year: 1979, Page(s):100 - 107
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1120 KB)

    High-power fast-pulsed energy transfer requirements of many proposed fusion reactor concepts have prompted interest in the use of homopolar machines with superconducting excitation as "electromechanical capacitors." At the high rotor (collector) speeds necessary to maximize their desirability, these inherently high-current lowvoltage machines have demanding requirements for their current collectio... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Thermophysical Properties of Ag-CdO Composite Materials

    Publication Year: 1979, Page(s):46 - 51
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    Electrical resistivity, thermal expansion, microhardness and fracture strength measurements were made on Ag-CdO composites of a series of compositions including pure Ag and CdO. Measurements of thermal conductivity were derived from electrical resistivity data through the Wiedemann-Franz relationship. Standard methods of quantitative microscopy were used to determine the microstructural character ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

This Transaction ceased production in 1993. The current publication is titled IEEE Transactions on Components, Packaging, and Manufacturing Technology.

Full Aims & Scope