Materials Literature
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An account is given of a yarn-on-yarn abrasion test developed for use on continuous–filament rope yarns. It involves application of a reciprocating motion to two yarn sections wrapped helically together under tension. Different modes of behaviour were found under more severe and less severe abrasion conditions. Tests…
The Mott formula relating the electron scattering factor to that for X-rays is inaccurate in its numerical form in the small-angle region. Effects of the inaccuracy on both kinematic and dynamical diffraction have been investigated. Some artifacts arising from the inaccuracy have been found in simulated electron micro…
The compound MnCu(obbz)·H2O [obbz = oxamido bis(benzoato)], obtained by reaction of the Mn2+ ion with the copper(II)‘brick’[Cu(obbz)]2–, orders ferromagnetically at Tc= 14 K; below Tc it exhibits a hysteresis loop characteristic of a soft ferromagnet.
A series of critical experiments was performed on single crystal CMSX-3 and equiaxed grain Mar-M246 specimens to identify the mechanisms responsible for the degradation in stress-rupture properties of 0.020 in. thick mini-flats machined from airfoils compared with 0.250 in. diameter standard test bars.
Abstract The requirements for PVC suspension resin have changed considerably in the last few years, so much so that few companies have products on their ranges that are more than 4 or 5 years old. The suspending agent has a crucial influence on the morphology of the resin, so the changes in resin characteristics have…
Abstract The new compound Na 8 SnSb 4 has been prepared from appropriate mixtures of the elements at 700 °C in evacuated silica ampoules coated with glassy carbon. The structure has been determined by single crystal X-ray diffraction data (cubic, space group Fd3m, a - 1481.6(3) pm, Z = 8, R = 0.044 for 263 reflections…
The thermal expansion of Y 2 SiO 5 crystals has been measured for the principal crystallographic directions and two orthogonal directions in the (010) plane in the temperature range 25° to 200°C. This monoclinic crystal has strongly anisotropic expansions with coefficients which range from 0.6 × 10 −6 /°C for [100] to…
The PTC effect in KNbO3, KBiTi2O6, NaBiTi2O6, Pb2FeNbO6, Pb2FeTaO6 having phase transitions of different types (FE-PE, FE-FE and FE-AFE) has been investigated. In oxides possessing both the FE-PE and the FE-FE phase transition, a ρ(T) anomaly, depending on the values of the donor concentration and the surface state de…
Polyphenylene sulfide (PPS) and Polyetherether ketone are high performance engineer ing thermoplastics with a unique combination of excellent thermal, mechanical and en vironmental properties. This paper presents the thermogravimetric properties of PPS and PEEK resins and carbon fiber reinforced composites. The additi…
Abstract The interpretation of soil tests for K in highly weathered soils may be improved if the K buffering power is considered in addition to extractable K. This study was conducted to determine if cation exchange capacity (CEC) and humic matter (HM) should be included in the development of more meaningful K availab…
Creep tests of Ni-base heat resistant alloys (Hastelloy XR and XR-II) were conducted at 950°C in four kinds of helium environments with different impurity compositions in order to examine the effect of decarburizing environment.Both alloys were decarburized in a helium environment with low partial pressure of oxygen a…
Larger carbides inherent in high-alloy steels can initiate surface peeling failures and cause other raceway distress which affects bearing performance under thin lubrication film operating conditions. They can also contribute to the microstructural alteration in conventional subsurface rolling contact fatigue. Carburi…
The computer simulation of galvanic corrosion systems has been shown to provide accurate information that can be used to improve design and avoid costly failure. The systems capability to model any general geometry coupled with the ability to accept a wide variety of forms of polarization data enables its effective us…
Single crystals of boron-containing apatite (BAP) were grown by standard flux growth technique with excess B2O3 as flux. A mixture with the composition 35CaO-5P2O5-60B2O3 (wt%) was heated at 1200°C for 10 hours and then cooled at a rate of 8.3°C/h. Hexagonal prismatic crystals (0.3mm×0.3mm×11mm) were obtained. The che…
A technique is presented for digital computer simulation of the interaction between a polluted insulator and a high-voltage, direct-current test source. Both uncontrolled and feedback-controlled voltage-double sources are considered. The polluted insulator is represented by one or more arcs in series with the wet cond…
Steels used in rolling bearing applications require high reliability and consistency. The SKF MR process developments carried out at Ovako Steel have led to the design of cleanliness specifications which correspond to such requirements. The reduction of oxygen content and harmful nonmetallic inclusions have led to sig…
Abstract The nostoichiometry and point‐defect structure of PbTe was investigated by various methods including carrier‐concentration, lattice‐constant, positron‐annihilation and vapour‐density measurements. The results are discussed in comparison with data published by other authors. New aspects are obtained especially…
R2Zr2O7 and (R1-xEux)2Zr2O7 (R=La, Pr, Sm, Eu, Gd, Tb, Er, Y) were prepared at 1600°C in air and their fluorescence properties were studied. The crystal structures of these compounds were pyrochlorite-type for the light rare earths and CaF2-type for the heavy rare earths, respectively. However, Gd2Zr2O7 and Y2Zr2O7 sh…
Chapter 1 Classification and Properties of Materials Chapter 2 The Structure of Materials Chapter 3 Equilibrium Diagrams Chapter 4 Plain Carbon and Alloy Steels Chapter 5 Heat Treatment of Steel Chapter 6 Case Hardening of Steel Chapter 7 Tool Steels Chapter 8 Stainless Steels and High Temperature Alloys Chapter 9 Cas…
The zeolities gmelinite and ZSM-12 are synthesized using a cationic polymer template, both cases illustrating the templating effect; magic-angle 13C n.m.r. spectra provide direct evidence that the polymer is retained in the pore system of these zeolites.