Jon “Crazy Face” Scheyer scored 22 points as Blue Devils advanced to their 10th ACC championship game in the last 12 years.
Kyle Singler added 14 points for Duke who made only 20 of 55 shots (36.4 percent), but managed to can nine of 22 three-pointers (40.9 percent).
Duke (27-6) led only 44-41 before Gerald Henderson's 3-pointer with 8:53 left started the 12-2 run. Scheyer and David McClure each had back-to-back baskets in the run, which ended with Duke leading 56-43 with 5:35 remaining.
Eric Hayes answered with four straight points for Maryland (20-13), but he missed a 3-point attempt with 2 minutes left after the Terrapins cut the lead to seven points at 57-50.
Hayes led Maryland with 20 points, including 15 after Duke's 12-2 run. He scored 15 of Maryland's final 18 points. Greivis Vasquez had 14 points and Adrian Bowie added 10 for the Terrapins.
Vasquez made only 6 of 17 shots.
Maryland was left to hope its two wins in the tournament will be enough to impress the NCAA tournament selection committee.
According to late night ESPN predictions, the Terps are in…
"It changes hour to hour, who's on the bubble," he said. "I like what we've done in the best conference in the country in terms of the RPI." Head coach Gary Williams noted his team beat Michigan, Michigan State and North Carolina.
Duke will be trying to win the ACC tournament for the fourth time as a No. 3 seed. The Blue Devils also were No. 3 seeds when winning titles in 1988, 2003 and 2005.
Duke could land a No. 2 seed in the NCAA tournament field by beating the Seminoles. Duke swept the regular-season series against Florida State, including an 84-81 home victory on March 3.
(AP Photo/Dave Martin and Jonathan Newton/Washington Post)