After a trip to Costa Rica, Corey M. Brachmann and his bride, Cristin M. Davignon, will be making their home in Wheatfield. The Rev. Edward F. Jost Jr. heard the couple's nuptial vows at 1:30 p.m. Saturday in Ascension Catholic Church, North Tonawanda, preceding a reception in Salvatore's Italian Gardens. Mr. and Mrs. David Davignon of North Tonawanda are parents of the bride and the bridegroom's parents are Linda MacDougall of Amherst and Michael Brachmann of North Tonawanda. A graduate of University at Buffalo, the bride is a chemist employed by Abraxis BioScience, Grand Island. The bridegroom is a central services supervisor for Niagara County, Lockport. The couple are North Tonawanda High School alumni.