Bulletin  of  Materials  Science

Volume  25,  No.  4,  August 2002

CONTENTS


Cover:  SEM of co-precipitated NiO/TiO2 samples calcined at 700°C for 8 h. For details, 
see p. 273.


Synthesis
Synthesis of Ba3ZnNb2O9--Sr3ZnNb 2O9 solid solution and their dielectric properties

M Thirumal and A K Ganguli

259


Self-propagating high temperature synthesis and magnetic properties of Ni0 . 35 Zn0 . 65 Fe2O4 powders

Yao Li, Jiupeng Zhao and Jiecai Han

263

Phase Transitions


Crystal structure transformation of TiO2 in presence of Fe2O3 and NiO in air atmosphere

S Riyas, V Ahmed Yasir and P N Mohan Das

267


Structure determination at room temperature and phase transition studies above T
in ABi4Ti4O15 (A = Ba, Sr or Pb)

 

G Nalini and T N Guru Row

275

Catalytic Materials


Catalytic characterization of bi-functional catalysts derived from Pd--Mg--Al layered double hydroxides

N N Das and S C Srivastava

283

Alloys and Steels


Metadynamic recrystallization in C steels

A R Morgridge

291


Fatigue crack growth retardation in spot heated mild steel sheet

B B Verma and P K Ray

301


Hyperfine field distributions in disordered Mn2CoSn and Mn2NiSn Heusler alloys

N Lakshmi, Anil Pandey and K Venugopalan

309


Effect of alloying with zinc on SFE of aluminium by study of lattice imperfections in cold worked Al--Zn alloys

G Karmakar, R Sen, S K Chattopadhyay, A K Meikap and S K Chatterjee

315


Impact toughness of high strength low alloy TMT reinforcement ribbed bar

Bimal Kumar Panigrahi and Surendra Kumar Jain

319

Semiconductors


Experimental f " of As at 170, 200, 250 and 300 K from the Bijvoet pairs of GaAs

G Raja Sudha, K Vimala Devi, D Arthi, S Prasanna Subramanian,
N Srinivasan and R Saravanan


325


On the symmetry of phosphorous doped ZnSe

N Sankar and K Ramachandran

329


Si diffusion in GaAs

P Murugan, R Pothiraj, S D D Roy and K Ramachandran

335

Polymers


Thermally induced structural changes in Nomex fibres


Anjana Jain and Kalyani Vijayan

341

Ferroelectrics


Structural, dielectric and transport properties of Pb(Mn0 . 5 W 0 . 5 )O3

V L Mathe, K K Patankar, S D Lotke, P B Joshi and S A Patil

347

Magnetic Materials


Infrared absorption spectroscopic study of Nd3+ substituted Zn--Mg ferrites

B P Ladgaonkar, C B Kolekar and A S Vaingankar

351

Liquid Crystals


Azomesogens with 1,2,4-trisubstituted benzene moiety

R A Vora and A K Prajapati

355

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